The "civilian" Boss 302 engine had a 4 bolt main block with screw-in freeze plugs and a forged steel crank. Edelbrock 5093: Cylinder Heads, E-Street, Aluminum, Assembled, 84cc Chamber, 210cc Intake Runner, Mopar, Big Block, Pair Are you looking for a set of entry-level street performance heads for your modern street rod, muscle car, or truck? Does anyone remember the six cylinder heads they made for Bruce Sizemore. In my 70 years of fooling with cars, we always had a formula. Not too much carb for this engine. Theyre fully assembled with valve springs, retainers, locks, guideplates, studs, and seals. Remember this correction adjustment is approximate and is only meant to get you close for the initial start up of the engine. For high-performance's street and competition, our dual-plane design makes outstanding power from 1500 to 6500 rpm. high power capabilities. You can see the marks the intake valves made so you can clearly see the reliefs are not big enough (as in diameter, not depth). For a better experience, please enable JavaScript in your browser before proceeding. That was a surprise.. "Basically, the DZ 302 shared all the specs with the previous 365-horsepower 327, with the fuelie heads, the Duntov cam, an aluminum intake, and Holley carb. They are very capable iron heads. I think it was based on the Cleveland design. it will be a "high winder" and with a bullet proof bottom end and a 4 bolt block could run to 10,000 rpm b 4 exploading ! Flashing in ports was unacceptable. reach with flat gasket seat. We started FORD Drag Club at Horn-Williams Ford in Dallas,Tx. Can you further help me with where to buy this? In the 1960s, Ford was an outspoken car company, much as Pontiac Division was within General Motors. If we've muddied the waters a bit, it's only the result delivering more information on the way to a decision. The 306-horse 289 cubic inch High Performance small-block V-8 in Shelby GT350s took on Corvette and the rest and managed to spank Americas sports car in SCCA competition. It is now becoming sluggish, and I get LBSOD issues frequently because of the wifi. 302/351 X2 Head. Ford's original Boss 302 engine was only produced for two years (1969 and 1970), but it was so cool it's understandable why the little V-8 has gained such an . This engine was built in the 80s by someone with way to much money. 500 max! The Duntov cam that GM used in the DZ 302 had over 250 degrees of duration at .050 [inch]! Holdener explains. If you're drag racing in a class where the weight of the car divided by the cubic inches determines what class you run in, it may be advantageous to drop the displacement a little if it will allow you to get into the faster side of a slower class. Im using a fairly mild flat tappet cam, so growing the installed height of the springs by 60 or 70 thousandths woul put both the seat pressure and open pressure weill within specs for a flat tappet cam. So it can already be made to haul. The TFS head looks much stronger than the Edelbrock version above 5,500 rpm, but the maximum differential is only 13 hp at 5,900 rpm. Some of the guys were running ford 300 six cylinders with good success. and if you want to use a high-lift cam or supercharger; thats no problem, either. If I wasnt on a time crunch, I would have returned these heads. Combine Edelbrock quality with excellent power and a highly competitive price, and the E-Street Edelbrock heads strike us as an excellent choice. Said to be "overvalved" for street performance. Learn how your comment data is processed. Valves 2.02 / 1.55" . Revised cooling system passageways Siamese bore with drilled coolant crossover holes (Except on M-6010-B302BB ) Increased bulkhead material I think I have seen afrermarket heads but cannot rememmber where. A factory high-rise dual-plane intake manifold was used, with one part not period-correct. And then it's gonna be HP you'll make, not a lot of torque. The biggest difference between the two engines is the cylinder heads.. Ford went to Le Mans and beat Ferrari not once, but four times, settling an age-old dispute over who had had the fastest cars in the world. But for the rest of us, choosing a cylinder head might be a complex algorithm of price, power, brand loyalty, ease of installation, head bolt size, and maybe even shoe size if you're that compulsive. Ah now Plummer - it's not a secret if you post it on VMF! The DZ 302 in the Z/28 was a natural marketplace competitor to the Boss 302 from Ford. Is it the 69 or 70 Boss 302 head that's more streetable? And really, its a difference in the philosophy behind these two motors. While the DZ 302 had a stronger midrange than the Boss 302, in stock form, the Boss reigns supreme in the higher RPM range. Not the 2012-13 Coyote DOHC BOSS, but instead the genuine pushrod original from an era when Ford did the unthinkable repeatedlyand won! Edelbrock E-Street cylinder heads are just the ticket. The rocker studs are 7/16, not 3/8. http://forums.vintage-mustang.com/vintage-mustang-forum/721154-1970-mach-1-h-code-build.html. That puts lift over .500 inch .514 according to our calculations, minus the lash, Holdener reveals. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. The advantage was better flow because the intake was on one side and the exhaust was on the other. 58 cc Chamber. There was dust and paper bits all over the keyboard and screen!! Renegade Street. The only caveat to all this is that the Twisted Wedge heads do limit valve lift (0.600 inch) and duration on stock pistons due to their repositioned intake valvejust so you know. See all 22 photos. Im sure you had over 400. Building LS garbage? BOSS Cars Nationals 2005 - BOSS Cars Reunited. They use a Cleveland style quench chamber and standard 302 Boss/351 Boss/351C/351 SVO valve train parts (will accept 2.19"/1.71" valves). The Boss 302 takes the Mustang GT's suspension and adds higher-rate coil springs, stiffer bushings, and a larger diameter rear stabilizer bar. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. . Not sure about the 5089. unfortunately I missed the return window due to illness. However, it is generally agreed that aftermarket cylinder heads can provide significant performance gains, and that aluminum heads are often the best choice for racing applications. (Image/Jim Smart) Although these are 1969-70 BOSS 302 heads, they []. Don't know what the compression ratio would be with those pistons you mentioned but don't forget the HI-PO 289 produced 271 horses with 10.5 compression. All Edelbrock E-Street cylinder heads are assembled with manganese bronze valve guides, powder metal interlocking valve seats, and stainless steel one-piece valves with hardened valve tips. Ive built 302/347 engines with stock heads, Roush180/Windsor Jr. , and Trick Flow Twisted Wedge heads. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. The block is a 1980 302 Winsor. Index your plugs on these engines. WITH THE STIFFER SPRINGS I REALIZED THE PEDESTAL MOUNT ROCKERS WOULD MOST LIKE FAIL SO I MACHINED THE PEDESTAL PADS, DRILLED AND TAPPED AND INSTALLED HELI COILS FOR ROCKER STUDS. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. The Cleveland type heads are used in the 302 heads. Also; I had Carroll Shelby/SAAC racing program in several other FORD dealerships . It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. Also, the visual aesthetic is pretty plain, and the laptop doesnt have a sleek feel to it. That made for an incredibly close series of tests, which proved that regardless of how you get your displacement, similar displacement engines will make similar power and respond similarly to modifications. This is my first engine build, let me know if Im doing it all wrong. The 68 J and F code heads show to be the same in my information. Single angle amateur valve job and it was pretty sad looking At this point I called edelbrock and they gave me the song and dance so I called Jegs and they issued a return. Topping off the Boss 302 was a specially designed aluminum dual-plane intake manifold mounting a 780-CFM Holley four-barrel carburetor, covered by a closed air cleaner assembly with a single inlet snorkel and a ribbed, domed lid that was also chrome-plated. The BOSS piston was a unique item, configured to use the 289HP rod with the 302 stroke. We tried this formula to see what our basically stock BOSS 302 would do. 035 (which I am using). As you can see from these numbers, the Cleveland-style Boss 302 cylinder heads offer significantly more airflow at each valve opening point over the DZ 302's fuelie heads. Bought these and compared to the other (PC). JavaScript is disabled. Pair. . The factory 780cfm carburetors are really, really expensive, and we didnt want to spend a few thousand dollars on a carburetor, explains Holdener. These are perfect for the low compression big blocks of the mid to late 70s. These heads have the right size valve for those piston. This combo has been dynod at 460-ish hp at 5000 rpm and 550 ft lbs of torque at 2000 rpm. We'll squeeze all of this into these few short pages, which means we have a long way to go and a short time to get there. What cam specs and static CR? Once those two tasks were completed, the heads delivered the best peak horsepower and torque numbers of the entire test, knocking down an excellent 380 hp at 6,000 rpm. Best heads for the price. Ford took on the world with the GT40 supercar. Rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. Seems to me that if you get the right kit (ie correct wrist pin centering, rod length, etc), you should have no problem.. aliases: Bossssssman, bosscars, old fart, chat dawg, hey you. 18 Ft/Lbs - Aluminum Heads. This is the Head Bolt Torque Sequence (Pattern) for Ford's small block. Cylinder Head 190cc Assembled. The heads alone are excellent fit and quality. The best aluminum heads for 302, without a doubt, have an effect on the vehicle's RPM. A recent test of a prototype set of Hammerhead's castings bolted on a 427ci small-block stroker produced over 600 hp with a streetable hydraulic roller camshaft and 600 lb-ft of torque. Above you see a casting with a D1ZE part number. These heads are always perfect, but could use a little bowl work thanks team SUMMIT. Bolts in anywhere a 302 will go with the right headers and pan. The factory Boss 302 did not have a deep sump pan although it did have a baffle in the sump, and yes it has 1.73 ratio rockers from Ford. They used the 3 center sections of the heads. I am through with their products. No stick hole up top. Well I have a 1977 copy of Pop. 154-3701: SB Ford Boss 302 12pt Head Bolt Kit. Parts made from tooling for the cancelled 1971 BOSS 302 were used for service. We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. We'd love to test 'em all, but we decided to line up as many performance small-block Windsor Ford heads as we could find, as long as they were available complete for less than $1,350 for the pair. 58 cc Chamber. The head bolts used on a Boss 302 were a flanged-style head bolt. Your email address will not be published. I was building that garbage in 2nd grade. I was actually pleasantly surprised at the swirl polished valves and the large spring pockets for if you want to run larger springs with a monster cam! Yes you can bolt the 351C heads to a 289/302/351W block. And torque is what gets the car moving from a stop, pushing you back in the seat. Yates? The BOSS head was functionally identical to the 351C 4V head. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! 1.73:1 rockers, 522 lift 292 duration nets 420 HP at 6300. If you are looking for a set of World aluminum heads, you can find them at Bill Mitchell Products. Chevy used higher compression and lots of camshaft, combined with mild cylinder heads. for use w/ Special Intake. Camshafts were quite similar to the 289 HP. But the springs they come with are for a hydraulic roller cam. Tech-Sheet. BluePrint Engines HP9009: Cylinder Head, Assembled, Aluminum, 60cc Combustion Chamber, Square Port, Ford, 289, 302, 351, Stud Mount, Each Welcome to a new class of high performance cylinder headsBluePrint Muscle Series! Ford has always been a car company that dared to go where no automaker had ever gone before. For those who consider swirl a detriment to producing power this is a positive thing. The brute 427 FE Series big block that won Le Mans also reigned supreme in limited production 1964 Thunderbolt Fairlanes in NHRA competition. which will help take the wait off the rear main bearing. Would modifying the heads bring down the value of the heads? Actually, everything about these heads helps the little 302. As fitted to the Boss, the heads feature steel spring seats, screw-in rocker studs, pushrod guide plates, and adjustable rocker arms. These aluminum heads are assembled with the perfect match of components for outstanding, trouble-free performance. Budget iron can run $1195.00 for an easy 500 + hp but any more needs more valve area. 1970 Fastback (to be finished outside as a Boss 302 tribute), thanks for all the responces! We had a grad student at UMR custom design his own crossflow head for that engine and the entire thing was CNC'd from one piece of aluminum. Boss 302 is a Windsor engine; uses Windsor cam lobe profile & 1.6 Windsor rockers. There are still 6 other steam holes not present in the 5073 head that are in the 350 block circa 1972. The heads are Cleveland heads. I have certificate for it. Experimental Boss 302 style heads . SB Ford WP Man O'War iron block/Man O'War aluminum head Head Bolt Kit. disappointed discovering this situation. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. They cut the center two chambers from three Boss 302 heads then welded them together to form an inline six head that bolted on a 300 block! You have to rev it to the moon to really make any power. I had 90 runs on an original Boss 302 in a 70 Mustang. I simply cant believe this is all youve got. To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a 0.480-inch lift B303 hydraulic roller cam, and 9.0:1 compression. you could also get a 302 crank and rods with custom pistons, a 302 crank with 289 length con rods and off the shelf b2 pistons. The Ford heads did well during the testing, making a peak of 362 hp. If I were to shop for a personal laptop, Id never consider this laptop based purely on what it looks like. Great top end with these heads also. The Edelbrock 351C head shows a controlled "swirl ramp" that comes on lightly at 100 RPMs starting at .450" lift and increases steadily to 2000 RPMs at .600" lift. If you used windsor heads its not a BOSS. A forum community dedicated to hot rod owners and enthusiasts. . $1,692.99. View Details. If it is, then you know what you need to do. When the vacuum is high, the intake is sucking oil through the valves. I would suggest pulling the vavles and wiping everything down. The Ford had slightly less compression, at 10.5:1, so out of the gate, Chevy had a little bit of an advantage.. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. The intake is off a 1965 Shellby. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. Its all a win,win. Looking at the graph, it looks like the DZ 302 actually outperforms the Boss 302 from 3,700 rpm until 5,800rpm. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. Edelbrock 5025: Cylinder Heads, E-Street, Aluminum, Assembled, 60cc Chamber, 170cc Intake Runner, Ford, 289, 302, 351W, Pair - Are you looking for a set of entry-level street performance heads for your modern street rod, muscle car, or truck? Im just hoping the new Edelbrock intake that arrived yesterday is better than these. All in all, Im not a fan of this series from Dell. If weight is a consideration, keep in mind that these iron castings weigh considerably more than the rest of the aluminum heads. There is a lot he did to this engine, if you're interested but he kept the orig. Needless to say they began to really spank everybody and by the end of the season the six cylinders were out ruled. While the Boss 302 was normally considered a 302 with 351 Cleveland heads, these canted-valve heads were used first on the Boss before the rest of the Cleveland was developed. Why would you build a 302. They had problems with the 69 heads..made some changes in 70 and won the Trans Am races.So 70 or 71 heads are the better heads. Cylinder heads casting ID decode for 260 289 302 351 390 406 427 428 429 460FE Boss Shelby. Im not sure what has happened to Edelbrock, but their quality control sucks. For use on pre-pollution controlled vehicles only. It collects next to nothing. Enzo Ferrari, and others, were handed their backsides. Boss 302 - 1970 Boss. We will admit to you our results on the dyno were disappointing304 horsepower and 288 lb.-ft. of torque. The Ford roller rockers use a fulcrum base and a 5/16-inch bolt to attach the rockers to the head. Ford New Boss 302 w/351C HDS Hex Head Stud Kit. They show to be suitable for the 221-302 Ford Small Block. This could easily cause a hot edge and create premature detonation of the charge. 09 of shims installed so they look good. To clear up a few questions, the combustion chambers are 60cc, not 64cc. . Future availability is unknown. . A borescope down the intake revealed lots of oil in the intake runners near the valves. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. installed the heads on a 1978 460 bored out .060 over went from 500 hp to 551 hp @4900 rpm on a dyno 8/9/19. The Ford Racing X307 head is not the casting that comes on the Boss 302 crate engine, but its affordable price made it a natural choice for this test. After idling for a couple of minutes the engine will start smoking horribly. For Use w/289/302/351 Windsor-Style Engines. 154-3607: SB Ford 289-302 standard 12pt Head Bolt Kit. the engine was called a "boss 289" not a clevor, a clevor was a 351W with 351C heads and a custom intake. Purchased a long block on CL. FORD MUSTANG 302 CYLINDER HEADS Pre-Owned $177.50 classicautoresto (4,195) 100% or Best Offer +$199.05 shipping Sponsored ARP 154-4206 Black Ford New Boss 302 w/351C heads 12pt hsk In Stock Ready to Ship Best Deals Fast Shipping Brand New $250.99 partshawk (68,956) 99% List price: $367.99 32% off Buy It Now Free 4 day shipping Sponsored Stroke that thing. At RHP reasonably well ported (340+ / 200) set of iron heads with large S/S valves, manganese bronze guides, p/c seals, rocker studs and guideplates are $1,695 exchange. The Ford head uses a net-lash design that makes the valvetrain non-adjustable. This made-in-the-USA head is Edelbrock's value leader. Crate Engine, 302 C.I.D. Edelbrock E-Street cylinder heads are just the ticket. Performance Distributors Keeps The Spark Alive With SOS, A New Diesel Piston That Increases Power And Reduces, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop, Melling Offers New Timing Kits for Ford 4.6L and 5.4L SOHC, Reborn Retro Blower Packs Positive-Displacement Power For Fox, EngineLabs Tool Of The Month: Summit Racing Lb-In Torque, Why You Should NOT Emissions Delete Your Diesel, Can A Cold Air Intake Really Help Your Trucks, Ask The Expert: We Want Your Questions For Canton Racing, The Answers: DeatschWerks Responses To Your Fuel System, SEMA 2022: GEARWRENCH Leveled Up With Distinct Quality Hand, EngineLabs Tool Of The Month: Summit Racing AN Wrench, HOLY SHIP! Like we said, if best power or least price is your only concern, then the decision is easy. While it only had .480-inch of lift, that duration would really allow the RPM to climb. Install the gaskets with the raised seal towards the head and it will fit the ports much better. The Boss 302 and 351C-4V head casting are the same except for a minor difference in water passages. The BOSS 302 engine could use better cylinder heads with right-size port and valve sizing in a set of Trick Flow cylinder heads and a more compatible roller mechanical camshaft. However, this time it boasted 412 Horsepower and 390 lb-ft Torque! I was wondering how these heads would work on my 97 5. edelbrocks were my first finned aluminum heads for a flathead25 years agoand they were o. k. for a 239 or a 255, due to small combustion chambers. Boss 302. The BOSS 302 heads are known as "Cleveland style" heads as they are based on the head designed for the 351 Cleveland engine. The 300 and the 240 are identical blocks,the heads are different and the 240 is basically a destroked 300 so it will rev a little higher. I understand why now they are so much more money! The holes are also there in a 350 block and Felpro gasket as well as the 5073 head. I am running them on a 302 and purchased this set for a 351 build. Low mileage 440 from an RV, Hughes Whiplash cam and lifters, E-Street heads and RPM intake topped with a Quick Fuel Brawler 850 double pumper. As the 1968 Tunnel Port engine turned into a disaster, someone at Ford Engine Engineering got the idea to put a set of Cleveland heads on a Tunnel Port block and thus was the beginning of what would become the BOSS 302 engine. [] Heres a close up of the head Marvin is using on our 351C build. We should also mention that although we didn't test a stock iron casting, it should be clear that even the heads on the lower end of our test would still be an improvement over stock factory castings. But, I just came across this website and happened to ask about B. Sizemor's 6. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. These are certainly worthy of attention at this excellent price. I think the higher RPM one had larger valvesand ports, right? If we were going to use these heads on a street engine, we'd disassemble them and spend the extra bucks to add a 30-degree back-cut to the intake and exhaust valves to improve their overall flow. You wont find heads of this quality at a better price anywhere. Renegade Street. No more dyno there. Autozone has a great price on these heads. Ports 2.38" x 1.68" C9ZZ-9424-C. C9ZE-9425-A . But there is absolutely something else wrong. 1.290 in Spring. I might like to put it back together this summer with your fluid damper a 600 holley carb and maybe your electronic distributor . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. That may or may not make your ultimate choice any easier, but if so, you can thank us later. Generator stud kit for 1938-48, use #8506. 045. I changed the thermostat so it would dump alittle more gas in her no problems so for. They will outperform many of the average aluminum heads. DART . It was honestly a guess on my part and the Tech had no additional information or opinion to offer. Dells are ok computers. Buy It Now +C $186.98 shipping estimate. Max effort class rule stuff runs over $2K. detroit metro auto parts "302" - craigslist . The darned thing was rabid dog fast. The additional space improved the engine's breathing. I believe C.J. For a better experience, please enable JavaScript in your browser before proceeding. Boss 302 heads are unique.No other heads will work without some changes. I wanted to built a great runing, mild street motor around a stock sbf 302 short block. See the top reviewed local exterior and siding contractors in Hohenthann, Bavaria, Germany on Houzz. Generator stud kit for 1938-48; use #8506. He stated he spent over $10,000 back then. To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a .480-inch lift B303 hydraulic. E7 heads use 1.78 / 1.48 just like the 60s stuff. The 170/200/25 are the same block design, with the 250 having a taller deck height (so you can't easily make a 250 from a 200). I passed over a different set of heads at the recommendation of my machinist. These ford flathead cylinder heads feature original edelbrock script logo design for fords and mercurys. THE NEXT ISSUE IS THE RECOMMENDED INTAKE GASKET FEL-PRO 1262. The odds of you building a vintage Ford BOSS 302 engine are slim because Ford built so few and so many are already spoken for. The Fora platform includes forum software by XenForo. Nevertheless, for a street engine, this head delivers excellent midrange power. A stock Boss head will support way over 500 horsepower, where the Chevy will struggle at 400 horsepower. Finding a Street Boss intake likely wouldn't be too difficult as multiple manufacturers have cranked them out over the years. The F code 302-2V was made from 68-73. This provided more room for larger valves instead of the standard side-by-side arrangement. When you do that, you can see that the TFS head did substantially better than all the other heads above about 4,400 rpm. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Pontiac was the outlaw division. Inline and < 15* valve angle such as World Products Man O' War 10* heads promote very good performance. The BOSS 302 heads used some of the biggest valves in the industry. Edelbrock 1115 Ford Flathead Cylinder Head, Ford Racing M-6049-SCJA Super Cobra Jet Cylinder Head, Cylinder Head SBF Stud and Plate 1.94 Assembled, Air Flow Research Renegade Street Aluminum Cylinder Head SBF 2 PC P/N 1402, Edelbrock 1116 Ford Flathead Cylinder Head, Blueprint Engines HP9009 SBF Alm. The Mustang 5.0L Coyote Engine Gen 1, Gen 2 & Gen 3 differences are explained by Landan with LMR. The BOSS 302 heads used some of the biggest valves in the industry. 010 runout and wouldnt come out of the head without a lot of force (we never took it out). 2. That's what the TFS Twisted Wedge heads did here. Like with standard 4V heads, you would have to machine the tops of the heads to accept screw-in, adjustable rocker studs. For the 1968 Trans Am season, Ford took the 302 cubic inch Tunnel Port out there in search of victory. Whoever invented that crap ought to be shot. Maximum output for less money!. We learned on the first few pulls that we had too much carburetor with our 750 cfm Holley 4160 and too little camshaft. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. [IMG]http://www.dslextreme.com/users/jbooth/sidenew1.jpg[/IMG][IMG]http://www.dslextreme.com/users/jbooth/enginenew1.jpg[/IMG]. Ford had and did a great job with Ford Motorsports programs which we were in . When it comes to the valve events, Ford and Chevrolet took two different approaches. No mention of those holes in the instructions. very poorly packaged, opened it and there was no screen protection sheet between screen and keyboard. They pull much harder through the midrange than the 351W heads they replaced on my 302 Ford. Always interested in how things work, he enjoys sharing his passion for automotive technology with the reader. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. FLO-TEK Performance cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. I also figured that the DZ 302s smaller heads, with better port velocity and more compression, would make more peak torque.

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