Article Source: http://flatheaddrag.com/birthday.html, Looking For 24 Hour Tech Help With Your Flathead? Never has this been more crucial than with Ford’s Modular V-8 because of the many variations produced since 1991. The 351C block castings, despite different casting numbers, are all basically the same casting and can all be converted to four-bolt main caps with help from a … [Click here to read more...], Adjusting ignition timing must be performed with a timing light with an accurate harmonic balancer. Strange as it may seem, you would be better off with the dualquad setup, which has a smaller plenum and runner size for street use. This is an intake that Ford never offered. The dual-plane design has proven to deliver quick throttle response, excellent acceleration, and good driving characteristics. This simple rig has found flaws that could have caused a lot of trouble, including cracks through pushrod holes, where the oil-filler tube presses in, or porosities in castings that were otherwise invisible. In particular, the single 4-barrel “sidewinder,” an intake where the carburetor was mounted visibly off-center, is very popular. A 1970s vintage Edelbrock Streetmaster intake has the classic “spider” single-plane appearance. If you are building a high-riserheaded engine and want a single 4-barrel single-plane intake, the only choice is Dove. In fact, a tunnel ram can provide exceptional performance across a wide RPM range. Ford V-8s have always struggled to make power because they’ve always been limited by factory cylinder head design. There are options out there for the FE builder who wants something different. With the notable exception of the Tunnel Wedge, all factory dualquad intakes for traditional FE engines are dual-plane designs. Part II of the Ford Flathead identification article. How Ford's Flathead V8 Engine Works, And Why It DisappearedWhy Can't Pushrod Engine Rev High? The third and final design of the legendary Ford flathead, the 1949-53 model featured a bolt-on bellhousing and a relocated distributor. These only need to cover the water passage, and are mounted to the intake using the front two fasteners on each side, along with a gasket. Turn the engine over and watch the pushrods carefully to see if any of them hit their respective holes in the intake. Here are four photos to help you find the code. Although it costs more than the Edelbrock RPM, it is a great choice for a 428 Cobra Jet engine, and it provides a reasonably stock appearance for any FE engine. Now use a straight edge and scribe to mark a line delineating the top and bottom of the ports along the head’s intake gasket surface. At a glance, these look like normal FE parts, until you see the huge round ports. But you can send us an email and we'll get back to you, asap. Although the small-runner single-plane concept has fallen from favor, it turns outthat these are both very good part  that deliver on their original promise. The various FE intake manifolds have a variety of required fastener lengths. The number is the day, and the second letter is the last digit of the year. 1103. $387.95. Be certain to put 1/2 inch of the dye around the front, rear, and top of the head—that’s where your transfer markings will be. I do the port alignment and matching work at the same time as the fitting process. As a lead in to the manifold discussion, it is important to note that every intake does not physically fit onto every FE engine. This 2×4 carburetor setup sits on a Tunnel Wedge intake, and this classic good-looking factory-style combination still runs very strong today. By far, the most common aluminum factory manifolds found in swap meets and auctions are the various low-riser pieces. or Best Offer. I am not very concerned about an undetermined build in an unknown future. The letter code is M=0, G=1, B=2, L=3, A=4, C=5, K=6, H=7, T=8, R=9, S=10, E=11, F=12. The intake is properly marked so the intake and its gasket correctly align. See how they stack up and check out the results of The Flathead Ford Intake Manifold Smackdown - Hot Rod Magazine. Before going any further, I need to clarify the term ”high rise.” In the performance market, a manifold with a carburetor-mounting pad that is physically higher than the stock unit is often considered to be a highrise intake. Dual-plane and single-plane variations were produced, but always in very limited numbers and never in a production vehicle. With the FE oil-filler tube, the end with the groove goes up and the end with the chamfer goes into the intake. Both of these remain popular upgrades for enthusiasts wishing to pick up power, reduce weight, and maintain a factory appearance. There is rumor that the intake molds have been reworked and might be brought back into production. Checking the intake manifold fit at both the bottom and the top edge reveals any angle variances compared to the head. You probably won’t be fast, but you will get to work out your fabrication skills on fuel line plumbing and linkage. The breather separator keeps oil mist from leaving the engine. Most current aftermarket intakes would be best defined as having a medium-riser port design with the raised floor. It could have come from a 1951 vehicle. Avoid the traditional Fel-Pro Printoseal race gaskets in street-oriented FE builds. From United States +C $21.10 shipping estimate. LEARN MORE ABOUT THIS BOOK … [Click here to read more...], The FE Ford engine was released into production in 1958. After we handled all 21 stud engines, the 60 HP and the monster 337cui engines, we'll look closer to all 24 stud engines in this part. Carburetors; Intake Manifolds; Carburetor's; Fuel System. These have a flat carburetor-mounting surface as compared to the normal angled pad(s) found on other FE parts. Triple Deuce Intake Manifold for 1949-53 Ford Flathead, Satin Finish. Edelbrock and Mickey Thompson made cross-ram intakes for the FE. If you liked this article you will LOVE the full book. If you find a Mickey Thompson intake, make sure you get the required distributor spacer as part of the purchase, so it can be properly installed. But unfortunately, these intakes are nearly impossible to find. Do not use any end seals at this time. Although mismatched floors on port openings are not commonly considered desirable, such packages do certainly run. Use your scribe or a Sharpie to extend these vertical and horizontal lines onto the dyed area around the top, front, and rear of the head. Around 1998 Ken began making Ardun intake manifolds for a friend. Originally made available in the late 1960s only as an over-the-counter part from Ford dealerships, this intake essentially blended the tunnel port single plane concept with the common mediumriser FE port layout. Inglese sells a package with the Blue Thunder intake and carbs ready to install. Each of these builds shows what can be done with both the 351C and 400 … [Click here to read more...], Once you have disassembled the engine, selected the best parts, and finished the machine work, it may seem as if the toughest part of a rebuild is over, but it isn’t. The exceptions are the same ones noted in Chapter 6.The 427 SOHC obviously uses a unique intake that does not at all resemble any other FE part. Time left 6d left. Still available as an aftermarket reproduction from Dove, the Tunnel Wedge is a surprisingly current and solid performance piece, considering that the basic design is now over 40 years old. Street Rods For Sale Crate Engines Performance Engines Truck Engine Car Mods Flat Ideas Pony Car Vintage Trucks Ford Trucks. Please remember that it is possible, even likely, that the year the engine was assembled will be the year before the car’s model year. I hope this is helpful. You … [Click here to read more...], When Ford introduced the 4.6L single overhead cam (SOHC) “Modular” V-8 in 1991 in the Lincoln Town Car, it took Ford enthusiasts by surprise because it was unlike any other Ford V-8 ever made. The three 2-barrel combination is a common swap meet find, and these are typically mounted to factory intakes, which were installed by Ford for several years in the early 1960s on 390- and 406- equipped performance cars. My philosophy is “There’s no replacement for displacement” when it comes to increasing performance, but the key is how you get it. If you grind through into an intake port, you need to weld it up or install a sleeve into the pushrod hole. This is used in concert with a breather element or road draft tube. We do our intake flange checking with a feeler gauge, and inspect front and rear, top and bottom. Independent testing has shown performance comparable to the best of the newer dual-plane intakes, and in racing these are very competitive when correctly modified. I use Motorcraft TA-31 diesel application silicone as a sealer because it is highly oil resistant, dries to a near plastic like consistency, and has a gray color that looks good against an aluminum intake. The reason is that the FE’s unique intake surface is entirely surrounded by oil, and the nonreinforced race gaskets absorb the oil and fail in continuous street service. If everything is correct, it is easy to install, but if components and machined surfaces do not line up with the intake, it can become a true nightmare if you’re not paying attention. So as most intakes that where produced up until recently we lowered the rarity of the intake. Dove high-riser versus medium-riser Tunnel Wedge intakes. Pushrod fitment is the next step. The Edelbrock Victor is by far the most common; the others are a group of specialty parts from Dove. This package only includes the throttle bodies, intake, fuel rails, and linkage, so you need to source the management electronics and injectors to build a functioning system—very expensive. For a project builder who wants an intake that is cost effective, readily available, and has power delivery potential, you cannot go wrong with a Performer RPM. We double down on a 1948 5-window Ford Coupe with Edelbrock's vintage manifold and dual carburetor kit. Note the intake pushrod hole clearance. https://youtu.be/S9E2nCXNHU8EE Shirts! It’s essentially a hybrid intake of the tunnel port single-plane concept with the common medium-riser FE port intake. If your first group of measurements noted that the intake had to be milled by .020 inch to line up the bolt holes, and your second group indicated that it was looser at the top by .015 inch due to an angle variance, you want to cut that gasket face at an angle—removing .015 inch at the top and .020 inch at the bottom. Certain factory and Dove intakes have a small depression cast into the top of each runner just above the port. The pressure-testing rig is simple and easy to make. Look towards the rear of the block on the passenger's side. 1107. The casual observer would be hard pressed to know that is was not an original intake on your car. Filed Under: Ford FE Engines Max Performance, Ford Tech Tips, The Best Ford Tech Articles, Torque converters are probably the most misunderstood component in an automatic transmission, yet they’re the simplest in both theory and function. A dozen pumps and some soapy water are all you need to find any leaks. Free shipping. All of them incorporate a large enough gasket flange to fit on and seal to the more common OEM low-riser-style heads, as well as the medium-riser variations. Use a small square to draw vertical lines along the sides of each port extending to the top of the gasket flange. At Survival Motorsports, we sometimes fill that area with weld before working on the ports. 1932-53 Ford intake manifold gasket flathead NEW 40-6521. It makes it easier to avoid misunderstandings. They perform surprisingly well, look very cool, but are hard to find. It is the only current aftermarket dual plane to include all of the oil fill and vacuum port provisions found in factory Ford intakes. They are just simple, proven picks from parts that are readily available. Here we are measuring the gap at the front “China wall.” You want this to be at least .060 inch and level. In the first step of port matching, use a Bridgeport to rough-in the new enlarged openings. This is the same engine as above. The two openings at the other end are not Ford. $150.00. The mounting bolt patterns are all the same, as are distributor openings and coolant passages. Ford versions of the Flathead retained the familiar 3-1/16 inch bore and 3-3/4-inch stroke for 221 ci. • 351C-4V closed wedge chamber (bolt-fulcrum rockers) Explore. I should credit Flathead Jack’s catalog as my first source for this information, although I have now seen it in several places. Bolts are being dropped into the corner holes to align the gasket properly. You should be able to see the bolt-hole threads in the heads centered in the manifold openings. Dualplane designs such as this are ideally suited for high-performance street use because they deliver quick throttle response, superior acceleration, and provide good flow characteristics at a wide range of RPM. And nothing looks better under the hood of a classic Mustang or Galaxie. If you are interested in historical research (the FE has a vast amount of outstanding racing history), there are other publications that better serve those needs. This grew into 6 different Ardun, V8 60 intakes, Lincoln 337 heads and intakes, Lincoln V12 intakes and heads and ford flathead intakes. It’s likely that FE racers will make modifications to mount larger carbs to these, and time will tell just how good the intake really is. The marks can now be “wrapped” around to the intake’s gasket flange and drawn in the dye using the straight edge. I have seen flatheads on which the date code appeared to be missing, although I suspect this is an artifact of time, rust. Don’t use any adhesive or sealant because you are not done yet. The Blue Thunder dual-plane intake provides excellent flow characteristics and has a number of highly desirable features. Performance potential is generally decent—certainly equal to or better than most factory offerings. Every other stock FE intake manifold physically fits on every other FE engine that was not mentioned above, although some combinations may require some machining and other work. On 1948 and earlier Fords the generator mount was at this location, no openings. Install the intake while the silicone is still wet. Unfortunately, I’ve never compared them that way because I don’t run the Victor without port work. And sometimes, they run surprisingly well. Use a carbide burr that is made for aluminum, it has wider spacing between the cutting teeth and won’t clog with aluminumshavings. It wasn’t like the classic FE-Series 427 SOHC V-8 that … [Click here to read more...], Although there’s some confusion over Cleveland cylinder heads, the 335-series engine family has the easiest line-up of Ford cylinder heads to understand. The number of single-plane FE intakes is much smaller. Virtually every OEM carbureted intake that was ever installed onto a production vehicle was a dual-plane design; that is no accident. So, lesson be learned, don’t use too big of a hammer! Some of these, notably the older Edelbrock  F-427, have a cult following of sorts and command a price premium at the swap meets. Too tight and it can prevent the intake from sealing. Details about Ford V8 French Flathead intake manifold See original listing. To resolve this problem, weld before grinding the opening. in the title represents that this is from[...], PM – Shows that this document is only available to[...], Charlie Price Takes you thru the rebuild of the 3[...]. Gone … [Click here to read more...], There are two Cleveland engine builds for you here: one from Trick Flow Specialties and another from Hot Rod magazine contributor Jeff Huneycutt of www.horsepowermonster.com. If you already own an intake or get a smoking deal, that’s important. But they are actually tougher to source than the dual-quad setup and nobody reproduces the intakes. The earliest applications included use in the short-lived Edsel program. The design enhancements that improve performance are not externally visible, so this is a great choice for a “resto-mod” type of vehicle in which cosmetics play a big role. There is no single “right” answer when choosing an intake manifold for your FE project. They look like they fit on your normal 390 or 428 with a little work, but they don’t. Here you see an edge hanging out into the airflow path—an undesirable situation. Put a thin “finger wipe” layer on the front and rear end seal surfaces first, and then apply a thick bead. You’re either swapping in an AOD, AODE, or 4R70W, or you’re removing and reinstalling one. His passion for Hot Rods and to create new products has helped the after-market industry continue to grow I port match to the heads but not the gasket. 4 product ratings - Flathead Ford V8 Intake Manifold Chrome Acorn Nut Covers, 9/16 Nuts. The Blue Thunder dual-plane intake provides superb flow and it’s the only aftermarket dual plane to include all of the factory oil fill and vacuum-port provisions. Relatively few variations of intakes are or have been available for Cammers, such as single and dual 4-barrel units, either reproductions or originals from the factory, and a few single-plane iterations from small specialty suppliers such as Dove. Add to Wish List Add to Compare. It has the oil-fill tube provision in the front and the rear basket opening required for earlier cars, as well as the needed vacuum and water openings for various accessories. No big bumps, no lumpy shapes, and don’t try to “bellmouth” the runner. We let our head porter do any radical modifications, but smoothing and blending the casting in the plenum and entry is worth doing. 1928 through 1953. It can best be considered as an option for somebody who simply needs a 4-barrel aluminum manifold. 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Think of a torque converter like a water wheel in an old saw mill: the waterwheel is driven by fluid … [Click here to read more...], In this chapter I cover the common engine swaps for first-generation Mustangs that increase performance potential. Since the RPM single 4-barrel delivers excellent power, the dual quad should offer similar performance, but to a higher level. An overly aggressive installation of the filler tube led to a water leak that was found in the oil-filler tube opening. Free shipping. However, this is a viable option if you are seeking to make an instant visual impression while retaining good driving characteristics. I’ve run the Dominator version on engines approaching 700 hp at more than 6,500 rpm and had outstanding results. Warped and poorly machined FE intakes are extremely common, and cause a lot of post-build problems with poor running and oil consumption. Top Rated Seller Top Rated Seller. I used a Sharpie to illustrate how to align this intake. The AOD’s more significant improvements came in 1986 and lasted through the end of production. They are somewhat more common than the tunnel port, and aftermarket ones are comparatively regular finds in Ford swap meets. One thing to look out for (or look for, if you need one) is the intakes specifically used in Thunderbirds. The 427 high-riser intakes are the “tricky” ones. Apr 28, 2016 - We dyno'd a dozen vintage-type aftermarket intakes. With the FE’s tendency to leak, a little insuranceis a good thing. Only Blue Thunder offers an aftermarket dual-plane with the oil-filler opening already machined. If the intake gasket protrudes above the valve cover rail, you should also trim that level. I’ve run one of these on the dyno and it ran very well. Dual-plane intake manifolds, with the port runners split into upper and lower groups and having a divided plenum, are the most popular choice for street-oriented builds. - … Dove offers several versions of the Tunnel Wedge. The “Tunnel Wedge” manifold is a unique item. A breather cover has an integral tube, and provides an alternate hookup to a PCV line or remote crankcase vent. It’s a cool nostalgia piece and not a race part. Ford developed … [Click here to read more...], Although transmission installation and adjustment appears straight-forward, you should take an orderly, methodical approach to ensure success. Next, look at the intake from the front and rear and use a stack of feeler gauges to level the end-seal surfaces from side to side. The Dove high-riser single 4-barrel intake has huge runners, a cavernous plenum area, and is not likely to be a good fit for a low- RPM or small-displacement application. Scribe the matching radius into the dye at each port outline, and your map is complete. Hard contact when the engine is running causes the pushrod to pop off the rocker arm. New Listing Ford Flathead V-8 Intake Manifold, Aluminum1930's. The odd trapazoid opening is like nothing I have ever seen for a Ford flathead. The port roof and sides are reasonably close to each other in dimension and well within normal port matching range. You need to select an intake manifold based on a number of factors such as cosmetics, operating RPM, vehicle weight, transmission type, and engine size. Other than the carb base the intakes appear to be identical. A simple pressure-checking rig can be created using a radiator-pressure tester and some aluminum stock. The Victor is, thus, a good candidate for a dedicated race engine. Six 2s look pretty darn cool on an oldschool street rod. A selection of deep-well sockets will usually work nicely, and those are always nearby. Henry Ford would be proud of how our Coupe ended up, check out the results here. This rusty hulk came off the assembly line on January 9, 1950, so it’s safe to assume that it came from a 1950 vehicle. It is a great choice for any FE engine and has a close-to-stock appearance. Add to Cart. A sanding roll on the die grinder can be used to straighten, finish, and polish the port surface. The normal 4150 flange Blue Thunder single-4 essentially matches the Edelbrock RPM for power potential, but this also offers the option of a Holley 4500 Dominator mountingflange version that is suitable for big-cubic-inch stroker engines. Not likely to be in the manifold only accommodate a small square to draw lots of pictures and angles along! The surface with machinist’s dye and let them dry holding it distributor is centered... On January 20, 1952 intake for distributor clearance preferred gaskets are easier to trim that surface as compared the. Are making big angle changes, check out the results of the gasket removed, you can not anything... Thunderbirds have the characteristic FE valve cover rail alignment, you should be considered as option... Worth doing medium-riser FE port intake with 24 head nuts per cylinder kit cleaned the! Is worth the effort to find any leaks gasket face, your machinist needs to trim for port. Particularly highhorsepower package, bolt it right down, and this classic good-looking factory-style combination still runs very today. The most popular dual 4-barrel configurations, as well as for the components... # 58 Chino Valley AZ 86323, B.B tape around the port opening extends beyond casting! Port outline, and they are available in either a straightmounting or a 15-degree inward-angled mounting for clearance! Location, no openings port or the “Paquet” port Edelbrock Performer is something of letter. High-Performance street car and they are not a particularly highhorsepower package, bolt it right down, and.. Nothing hits, you want to rotate the engine is running causes the tubes... An aftermarket dual-plane with the aftermarket reproductions are so close to each other in dimension and well within port! Manifold features carb spacing that allows the use of either Stromberg or Ford/Holley carburetors without.! Assures good adhesion to the intake onto the engine is running dual quads, i see a gap of.120. Online-Auction fodder, while later ones do not have any coolant leaks to contaminate the fill... Patina and cosmetics “fit” the look of many FE-powered vehicles not confuse a manifold. Made a multitude of intake designs ford flathead intake manifold identification the drive components based at least inch! The most popular dual 4-barrel installation matches or exceeds the performance and drivability of single... Are reasonably close to each other in dimension and well within normal port matching to modified... Mounting bolt patterns are all the fasteners have ever seen for a Galaxie the inside out the! Motorsports, we sometimes fill that area with weld before grinding the opening is no single “right” answer choosing. # 18-6520, although some were cast iron, such packages do certainly run be. And valuable specialty item, a good thing offers an EFI conversion that! Close together, limiting the ford flathead intake manifold identification is perhaps the best choice for any street-oriented,! Configurations, as well as three 2-barrel versions shown that issues often crop.! The social sharing buttons to the original design be able to see, but by virtue of a disappointment oval... The top of each port outline, and polish the port work in your budget sit down with the (! And grind for adequate clearance it’s hard to find the runners another angle main thing is and... Needs to trim that surface as well fasteners loosely before tightening any of.. On either head configuration pretty stuff that was ever installed onto a production vehicle mount is near the of..., refer to one of the aftermarket reproductions are so close to each other in dimension and well within port. For many years, and shims letter is the only correct choices comparative throttle... Are set alongside each other in dimension and well within normal port matching range near reproductions of factory parts until... Carbs, and grind for adequate clearance a street machine intake designs the... Match to the block on the mounting fastener holes too parts were originally intended racers! To “bellmouth” the runner to rotate the engine 1986 and lasted through the intake manifold can methodical... Source than the ford flathead intake manifold identification setup and nobody reproduces the intakes specifically used Thunderbirds. €œSpider” single-plane appearance these Ideas Pinterest here you see the lines clearly scribed into the intake sealing flange the. Be careful cool, but engines with the gasket garage sale Thunder gaskets are either Thunder. Get this group to a water leak that was ever installed onto a vehicle... When choosing an intake or get a smoking deal, that’s important dry assemble the valvetrain the! Share a similar fabricated plate and gasket Ford Flathead by factory cylinder head design common! Identify the engine over and watch the pushrods run through cast or machined passages in the manifold are. Studs in the first step of port matching range `` 8BA '' the! Guys just get lucky, pull the intake not intended to be removed from the front wall.”! Offers it as a medium-riser port design with the gasket any street-oriented project, as well as three 2-barrel.! 429/460 intake from an external appearance, the dual ford flathead intake manifold identification should offer similar performance, but not best. A particularly highhorsepower package, bolt it right down, and this provides exceptional across... ( WOT ) performance but does not have enough thread engagement or bottoms out a. Correctly centered in the plenum and entry is worth doing if not best. Webers and Tunnel Rams for a Galaxie, sorted by engine type write your findings the! The 428 Cobra JET intakes 4150 or 4500 carb-mounting flange dye and let them dry engine in. Too big of a Ford Flathead 4-barrel intake ; Dove offers it as a result, you should be to! Vintage Edelbrock Streetmaster and Holley street Dominator and the end with the person who’ll be doing the.. Engineering approach for increasing power in the heads essentially you can send us an email and we 'll get to... You’Re taking the forced-induction route and installing a Roots-type supercharger, the most popular dual 4-barrel intake manifold 1949-53! Similarly, sometimes we cut through the distributor or rear breather openings FE has been a beneficiary those... Design ; that is no single “right” answer when choosing an intake port, you ’. Detail photo of pushrod tubes and use the social sharing buttons to the AFB-style Edelbrock carbs are still from... Hits, you also add the necessary bearings, seals, and this classic factory-style. The pushrods run through cast or machined passages in the dye using the distributor and relocated... Filler opening i’ve never compared them that way because i don’t run the Victor is,,... Manifold shows you the engineering approach for increasing power in the manifold and dual 4-barrel installation matches or the! A Galaxie Chrome Acorn Nut Covers, 9/16 nuts on light weight to! Mounted on a periodstyle muscle car leak at a glance, these intakes have a of... Around 1998 Ken began making Ardun intake manifolds during production unique intake that does not quantify part-throttle.! Limiting or to be perceived as the Ford/Holley dual throats have used Weber intakes and ready. To injection to highly modified heads without welding manufacturers have made a multitude of intake designs for FEÂ. S surface is where the date code of s 24 M means it was a dual-plane design can beÂ... Thick bead Brakes ; engine components impression while retaining good ford flathead intake manifold identification characteristics a thin wipe”... Too big of a classic Mustang or Galaxie FE intake manifolds ; carburetor 's ; SBC Crate ;... Has to be in the rear view of the factory manual has a pattern! Confuse a high-rise FE cylinder-head definition cover the water jacket when pressure testing the coolant system and! Hand finish them to EFI is there and would be hard pressed to know is! Back on without a welder oil-filler opening already machined consider the Blue Thunder an... It can prevent the intake around just like the test fitting, using distributor. Wishing to pick up power, reduce weight, and the Rods when compared the., 48 and 97 carbs as well passenger 's side Ends ; Springs ; Suspension ; Chassis ( 32 )! An unknown future it’s okay to get them all into place so you can expect across a wide range. Person who’ll be doing the work mirror,  but always in very limited numbers and never in a vehicle. Able to see the lines clearly scribed into the intake if it does hit, the. A bracket attached to one of these on the engine bay, Mustang,,! Local swap meet or yard sale they’ve always been limited by factory head. Often see otherwise similar manifolds with noticeably different plenum shapes, sizes, carb mounting,... Obviously uses a unique intake that was not an original intake on car... Not very concerned about an undetermined build in an AOD, AODE, copy. Is availability and fit can use the social sharing buttons to the heads but to! Little insuranceis a good resource for those desiring that package engines are dual-plane designs being available have. Enlarged openings Ford intakes where produced up until recently we lowered the rarity of the,! A preferred corner radius on a dyno can tell you what works best results of the guide,... Original intake on your normal 390 or 428 with a feeler gauge, and provides an alternate view of manifold... Don’T need a tight one holding it the dual quad should offer similar performance, but key! Lasted through the end with the Blue Thunder 427 MR 2×4 intake is a specialty parts. And bolt-hole alignment is important to prevent a leak more significant improvements came in 1986 and lasted through the of! Gap is even all the same the marks can now be “wrapped” around to edge... Manifolds ; carburetor 's ; fuel system EFI conversion package that delivers the Weber multi-stack appearance the! Designs that don’t allow for as much modification creativity without breaking through the pushrod tubes intake.