All rights reserved. No stick hole up top. 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! Building LS garbage? 2/22 . I believe C.J. 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. Experimental Part . Next, we test a low-rpm cam and a high-rpm cam in the same engine to demonstrate the power differences. The Ford heads did well during the testing, making a peak of 362 hp. Would it mess with the computer really bad. 1.73:1 rockers, 522 lift 292 duration nets 420 HP at 6300. We used Comp roller rockers for the remaining heads to level the playing field, but if you are considering a set of these heads, be aware that the rockers and fulcrums need to be considered as well. The intake ports flow 382 cfm at .750-inch of lift. The DZ 302 has a reputation for being a high-RPM screamer, and the camshaft is definitely part of that. If youre using stock pistons, get the version of these heads with the smaller intake valves (Part #5023). The result was a powerful 290-horse factory screamer with peak street power coming in around 6,000 rpm. It should be in the product description and specs. Put on a 351w in a 1979 Tbird. which de-stroked it. Absolutely no complaints, tons of flow and tons of fun. can I send the stud kit back? We will safeguard your e-mail and only send content you request. This 302 was in a F250 so I have to find the proper oil pan to fit the 83 foxbody, and proper fit for the oil dipstick entering the oil pan. The heads offered an excellent midrange power curve, behind only the Twisted Wedge casting between 4,000 and 5,500 rpm. However, there are a few notable differences between the Coyote in the F-150 and the Coyote in the Mustang. The BOSS head was functionally identical to the 351C 4V head. Australian car enthusiast with 30 years experience in the high performance industry. THAT IS UNACCEPTABLE IN MY BOOK. The connecting rods began life as the same C3AE rod as the 289 HiPo but they had 3/8" bolts and they were spot faced instead of broached where the head of the bolt sits. The Mustang 5.0L Coyote engine has evolved into the Boss 302, VooDoo 5.2L, and the Predator 5.2L. All in all, Im not a fan of this series from Dell. Fords incredible 1969-70 Trans Am BOSS 302. Gurney Eagle : Gurney Eagle race heads : Application. 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. From new ones to the aluminum headed one I have in my fairlane now. A factory high-rise dual-plane intake manifold was used, with one part not period-correct. The .10 difference in bore spacing( but the bolt pattern is the same square four as the smallblock) makes me think 3. [The Boss] cylinder head came about after Fords experience with the tunnel port cylinder head where they learned lots of head flow equals lots of power, Holdener relates. Cast aluminum block and heads: Intake Manifold: Composite Boss 302 Specific with shell-welded and runner pack: Exhaust Manifold: Tubular . Like with standard 4V heads, you would have to machine the tops of the heads to accept screw-in, adjustable rocker studs. 340 HP Boss, Long Block, Assembled, Internal Balance, Aluminum Cylinder Heads, Ford, Small Block Windsor, Each Part Number: FMS-M6007X2302E ( 1 ) Free Shipping Special Order $10,649.99 Not Available At This Time This product cannot be ordered at this time. It used to be listed in the FRRP catalog. 1.290 in Spring. Other Intakes >> Application. Even the stock cam should peek higher than 5500 rpm. the second head had not been full deburred from the milling process. Pair. And then it's gonna be HP you'll make, not a lot of torque. They show to be suitable for the 221-302 Ford Small Block. Edelbrock heads are available in two different versions, with either 1.94- or 2.02-inch intake valves. 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 . 154-3607: SB Ford 289-302 standard 12pt Head Bolt Kit. pulled heads out of box, one head was in very nice shape, ready for service. There are still 6 other steam holes not present in the 5073 head that are in the 350 block circa 1972. The stroke difference between the two engines amounted . 60 cc Chamber. Remember this correction adjustment is approximate and is only meant to get you close for the initial start up of the engine. We will admit to you our results on the dyno were disappointing304 horsepower and 288 lb.-ft. of torque. The 302 has a 9:1 compression ratio, while the 347 and 363 have 9.6:1 and 10.2:1, respectively. So howd they stack up? THE NEXT ISSUE IS THE RECOMMENDED INTAKE GASKET FEL-PRO 1262. That was a surprise.. I have used them for over 35 years and never seen something like this. . A big head and lots of airflow means lots of power. Especially for the price, I would buy them again in a heartbeat. When we tore apart the first head it was full of shavings and one of intake valves was super tight and one of the exhaust valves was bent w/. In the 1960s, Ford was an outspoken car company, much as Pontiac Division was within General Motors. (Image/Jim Smart) Although these are 1969-70 BOSS 302 heads, they []. Maximum output for less money!. 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 Condition does not matter! True but it seems excessive to me. As I recall from articles way back, this is an expensive process. You might even be able to get some rejects since you'd be cutting them up and remaching anyway. The heads are Cleveland heads. I was wondering how these heads would work on my 97 5. I was still only available with the special 302ci 290 hp high output engine. It was what the SCCA mandated for street homologation. 546hp @5600 rpm also had 630 ft-lbs torq@ 4400 rpm. Does any 351 Cleveland head fit it? Valves 2.02 / 1.55" . I have certificate for it. JavaScript is disabled. Having a hard time finding Boss 302 Heads online? These are perfect for the low compression big blocks of the mid to late 70s. The holes are also there in a 350 block and Felpro gasket as well as the 5073 head. For use only with Special heads . Meaning, their AQL is very low. After a couple of good seasons of running competitively with the big blocks a couple of guys showed up with a custom head that consisted of two V-8 Ford heads that had a combustion chamber removed from each end and were furnace bronzed together in the middle. I used them with a Comp Cams 274XE cam and a QFT 600cfm carb. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. on a brand new set of heads. World contributed the lone cast-iron head to our Ford small-block test. Their modern combustion chamber design helps to improve the combustion process and their larger-than-stock intake and exhaust ports help to move more air through your engine. The supply chain issues are eliminating a lot of choices. It is now becoming sluggish, and I get LBSOD issues frequently because of the wifi. 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 ! Renegade Street. 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? The darned thing was rabid dog fast. . stud kit is of poor quality everything else in my order was good quality. Alum. I am presently installing a 302 clevor into a 83 mustang GT. Prices listed are from the story's original publish date, February 1, 2013. They dont flow as well as some of the more expensive options available but they flow way better than OEM cast iron heads. Both of these options caused an internal vacuum leak because my intake sat low and the end seals did not let the intake ports seal like they should have. Suddenly these heads arent so appealing. The additional space improved the engine's breathing. This conversion was well documented and fairly popular when aftermarket heads were not available. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Is it the 69 or 70 Boss 302 head that's more streetable? Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! Boss 302 is a Windsor engine; uses Windsor cam lobe profile & 1.6 Windsor rockers. One thing I found particularly awesome about these heads is the spark plug holes and threads. Sign up for a free trial to MotorTrend+ today and start watching every episode of Engine Masters, plus much more! Though peak horsepower is a quick reference point for evaluation, we prefer to use average power in these comparisons because it always produces a better picture of overall performance. Ah now Plummer - it's not a secret if you post it on VMF! The compression ratio is 8. What I got was good, but the quality control person should not have let these go out the way they are. Fig. Reworking Cleveland heads I think would require reducing the size of some of the water passages and I unsure of the block clearance . For use on pre-pollution controlled vehicles only. 010 runout and wouldnt come out of the head without a lot of force (we never took it out). I was building that garbage in 2nd grade. A tad shorter then a 351W but a little wider due to the size of the heads. 370 HP Dressed Long Block Crate Engines BP3027CTC Crate Engine, Base Long Block, Aluminum Cylinder Heads, Roller Camshaft, 600 cfm Carburetor, Ford, 5.0L/302, Each Part Number: MLL-BP3027CTC Not Yet Reviewed Estimated Ship Date: Today Free Shipping $6,519.00 Add To Cart Compare Wish List I would guess Im somewhere around 375HP @ the flywheel in this build. Ever wonder what those camshaft specification numbers really mean and how they affect engine performance? There is no flat spot and these engines will pull from 2000 against any rival including a Windsor. 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. Index your plugs on these engines. Works with most standard components. However, Ford already had that architecture in its lineup, while Chevrolet did not. Learn how your comment data is processed. I thought the bolt pattern was the same, that is what helped to make the swap work. By doing the heads himself (he'd never tried it before), and using a 289HP air cleaner, 600 cfm carb, Edelbrock Performer RPM intake, stock distributor tuned to BOSS 302 specs, and a C9OZ-6250-C hydraulic cam, turned 323.5 hp @5300 rpm. My build is a 306, 9. There are plenty of them lying around used and new-old-stock. I remember reading about it in some magazine and I saw it on another forum recently. Very limited suppliers of flathead parts always look to speedway for my hotrod items. Will these heads work well?. So get comfortable, slip on your Ford-colored glasses, and hang on. Would modifying the heads bring down the value of the heads? Actually, everything about these heads helps the little 302. 1 on Pg 2 instructs the used to drill 3 holes if a 400 block is used. We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. . Not the 2012-13 Coyote DOHC BOSS, but instead the genuine pushrod original from an era when Ford did the unthinkable repeatedlyand won! Primarily, the 5.0L V8 in the F-150 received a lower compression ratio (10.5:1), intake camshafts with less duration, cast iron exhaust manifolds, and revised cylinder . 1970 - D0ZE-6090-A or B. Cover Autolite 4V casting D0ZX9B48-3 . While it only had .480-inch of lift, that duration would really allow the RPM to climb. One side opted for mild lift and more duration, and the other went for more lift and milder duration. high power capabilities. [] Heres a close up of the head Marvin is using on our 351C build. Save my name, email, and website in this browser for the next time I comment. THe new heads will have the same bolt-pattern as the original 6. 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. saving. Batten was at the top of their game then and were welding up and porting the best bow tie heads on the planet back then, besides all the othher stuff. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. Its not a good time to be building a performance engine. Roush? My first work Dell was super slow and sluggish, so I was sent a new one. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. in 1969 with Doug Durham and me ,TED FORDMAN EHRHARDT who took a new Boss 302 short block apart and checked all specs. Best heads for the price. Ford 260-289-302 Firing Order; Ford 351C 351M 400M Firing Order; Ford FE Firing Order; Ford 429 and 460 Firing Order; Chevy SB and BB Firing Order; Im sorry guys but you somehow missed something there are boss 302s out there cranking out way more than what you guys are claiming. 500 max! OK, you can do pretty well on a budget. After the engine is warmed up to its proper operating temperature range, you must go back and reset all the valves to the proper "hot" valve lash settings. You'll notice that we attenuated the horsepower graph to include just the power curve between 4,000 and 6,200 rpm. The RHS heads come out of the box with a very nice-looking casting, and back that image up with respectable performance. In my 70 years of fooling with cars, we always had a formula. . We got more than 450 HP on Fords dyno when we blew right rear tire and it took out Ford training board. Better than fighting with iron cylinder heads. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. These were available in stock and have the right size intake valves so I grabbed them instead. I SENT THEM RIGHT BACK. 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. My first ever computer was an HP Pavilion PC, and theyve always been my favorite brand since then. Currently working on a 1970 Mach 1 project. RHS shipped the heads with what should have been a sufficient single 1.460-inch-diameter valvespring, but the horsepower graph reveals that above 5,800 rpm the power trailed off, leading us to think that perhaps with a better spring this head could have carried the power out beyond 6,000 rpm, which would have improved its peak horsepower number. This head is intended for a flat-tappet camshaft, so it was outfitted with a small-diameter spring that might have limited its performance in the midrange slightly. They are Worth it. For Use w/289/302/351 Windsor-Style Engines. 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. AFR - Airflow . Peak power was good, at 349 hp, and torque is also reasonable. 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. I never did own a Boss 302, but I was around them when they were new.I have had lots of 351C. Greg has spent eighteen years and counting in automotive publishing, with most of his work having a very technical focus. Ford brought back the iconic 5.0L in the 2011 Mustang. Max effort class rule stuff runs over $2K. With such great success under its seat belt, Ford decided to dabble with the 289 and stroked 302 to see what could be done to further its performance image. Evidently youre research people are either misinformed, or just dont really care about building anything ford. 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. Boss 302 blocks are used all the time for Windsor headed performance buildups! 9 intake valves since they bolt on easy with no modification necessary. Wait 1.6 rockers? detroit metro auto parts "302" - craigslist . It was rated at 10.5:1 compression and 230 bhp (Shelby was rated at 250). Pair. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. my signature linesnot really directed at anyone in particular.. They'll work but have you got the Boss heads? you need custom pistons, boss intake, boss heads, boss pushrods, custom headers for a 65-66 mustang, 69-70 b2 headers for 67-70 mustang. Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. High-Quality Details With the Edelbrock part #7129 Performer RPM E-Boss 302 intake manifold, you can build a mock Boss engine by using a standard 302 block and Edelbrock Performer RPM Cleveland cylinder heads #61699. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. 165 cc Intake. I wanted to built a great runing, mild street motor around a stock sbf 302 short block. BluePrint Engines Ford 302 C.I.D. The J code 302-4V was only made in 68. Jeff Speegle Come see us @ ConcoursMustang.com MCA Shelby Judge, SAAC & Team Shelby Judge (in no particular order . 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. The block is a 1980 302 Winsor. It's also worth mentioning that due to a variety of scheduling and deadline pressures, the offerings from Dart and Pro Comp Electronics, both of which fit within our price prerequisite, didn't make the test. Great article is there a video available ? Henry Ford II wasnt going to have it any other way. Typical rebuild, headers, Competition solid lifter cam, 1.73 Crane roller rockers. These Ford cylinder heads all feature between 170cc and 180cc intake port volumes and offer excellent performance potential over even the best production iron 5.0-liter heads. Typing on the key kaed is cumbersome. The Ford head uses a net-lash design that makes the valvetrain non-adjustable. I have a 1969 Boss 302 original however I need to reassemble it I originally bought ARIES 10:1 forged pistons I believe 30 over . The 68 J and F code heads show to be the same in my information. The recommended spark plug for your typical application is the Champion 792 plug, gapped at. Theyre fully assembled with valve springs, retainers, locks, guideplates, studs, and seals. Im extremely disappointed in this blog.. 10 years????? Huge difference in quality. It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. Pic 2 is a spot next to a water port on the intake surface where it looks like the facing tool tilted some. 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. If you are looking for a set of World aluminum heads, you can find them at Bill Mitchell Products. 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). They used the 3 center sections of the heads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If we've muddied the waters a bit, it's only the result delivering more information on the way to a decision. I think I have seen afrermarket heads but cannot rememmber where. I figured the Boss would make peak power. For high-performance's street and competition, our dual-plane design makes outstanding power from 1500 to 6500 rpm. I called AFR about the problem and their only suggestion is to install a crankcase vacuum pump. Are you looking for a set of entry-level street performance heads for your modern street rod, musclecar, or truck? Edelbrock Performance Cylinder heads are manufactured of A356 aluminum and made in the USA for AMC, Buick, Chevy, Chrysler, Ford, Oldsmobile, & Pontiac engines. Small Block Ford. It ran a regular head that was tweaked (either before the slicing or class requirement). Small Block Ford. Large Inventory of New, Used and OEM Automotive Parts at Great Prices, Ford Boss 302 Block Heads Crane Roller Rockers Msd Distributor Jomar Stud, Boss 302 Engine Cylinder Head Bolts 716 Set 1969 1970 C9zz6065-a Sb 1116 Head, Boss 429 Heads Mustang 1969-1970 C9ae Hemi Original Ford Heads Rebuilt, Boss 302 Mustang Gasketsford Nos Headrocket Intake Fel-pro Valve Covers, Boss 302 Engine Cylinder Head Bolts Set 1969 1970 Mustang Ford Holman Moody, Arp 154-3602 Black Sb Ford Boss 302 Head Bolt Kit, Arp Head Studs 2011 2012 Ford Mustang Gt Boss 302 5.0l 4v V8 Coyote Stud Kit, Arp Head Stud Kit For Sb Ford Boss 302 M6010 Racing Block W 351c Iron Heads, New Fits 2010-2014 Ford Mustang Fo2503276 Right Side Halogen Head Light Assembly, Engine Cylinder Head Gasket-boss 302 Leftright Cometic Gasket C5961-040, Engine Cylinder Head Gasket-boss 302 Leftright Cometic Gasket C5958-040, Ford Racing M-6049-x2 Street Cruiser Cylinder Head 302351 X2 Head, Arp Cylinder Head Bolts High Performance Hex Head Ford 1969-70 Boss 302 Kit, Arp 154-4206 Head Stud Kit - New Boss 302 W351c Heads For Ford Small Block New, Arp 154-4206 Black Ford New Boss 302 W351c Heads 12pt Hsk, Arp Head Stud Kit For 69-70 Sb Ford Boss 302 W 716-14 Cylinder Block Threads, Ford Racing M-6014-boss Head Stud Kit Required For Boss 302 Blocks, 1969 Ford Mustang Boss 302 Article - Must See, Oem New Ford Racing Boss 302r Head Changing Kit - 11mm Head Bolts M6067m50br11, 1969 Boss 302 Mustang Cougar Coil To Head Bracket W Coil Strap Hardware, 1969 Boss 302 Mustang Cougar Coil To Head Bracket W Correct Hardware, Oem New Ford Racing Boss 302r Head Changing Kit M6067m50br, Arp Sbf Head Stud Kit - New Boss 302 W351c Heads 154-4206, Fits 2010-2014 Ford Mustang Gt Fo2502276c Capa Left Halogen Head Light Assembly, Headlight Set For 2010-2014 Ford Mustang Left And Right Black Housing 2pc, New Fits 2010-2014 Ford Mustang Gt Fo2502276 Left Halogen Head Light Assembly, Cometic Gaskets C5962-040 Ford New Boss 302 Head Gasket New Boss 302, Ahg1320l Apex Cylinder Head Gasket Driver Left Side New For F150 Truck Lh Hand, 1969 1970 Mustang Boss 302 Cylinder Head Bolt - Made In Usa - New, Arp-154-4002 Arp Cylinder Head Stud Pro-series Hex Head For Ford Sb Boss 302, 1969 1970 Boss 302 Head Bolt Set Of 20 Nos C9zz-6065-a, Ford Performance Parts M-6067-m50br11 Boss 302r Cylinder Head Changi, Valve Cover Adaptor Ford Cleveland Boss 302 On Small Block Ford Heads, Engine Cylinder Head Gasket Set-boss 302 Vin U Fits 2012 Ford Mustang 5.0l-v8, Es72480 Felpro Cylinder Head Bolts Set Of 10 New For F150 Truck Ford F-150 11-17, 1969 1970 Mustang Boss 302 Cylinder Head Bolt Set 20 Pieces Made In Usa - New, 090-072 Dorman Cylinder Head Plugs Set Of 5 New For Truck F150 F250 F350 Falcon, Mr. Gasket 5932 Boss 302 351c 4 Barrel Heads Ulktra Seal Header Gaskets, Hg4112 Dnj Cylinder Head Gasket Driver Or Passenger Side New For F350 Truck Ltd, Ahg1320r Apex Cylinder Head Gasket Passenger Right Side New For F150 Truck Rh, Es72479 Felpro Set Of 10 Cylinder Head Bolts New For F150 Truck Ford F-150 11-17, Ahg485 Apex Cylinder Head Gasket New For F350 Truck Falcon Galaxie Ltd Mustang, Remflex Exhaust Gaskets Ford Boss 302 351c Aftermarket Head 3091, Headlight For 2013-2014 Ford Mustang Pair Driver And Passenger Side Capa, Arp 154-4206 Fits Ford New Boss 302 W351c Heads 12pt Hsk. Looking at the graph, it looks like the DZ 302 actually outperforms the Boss 302 from 3,700 rpm until 5,800rpm. Cylinder Head 190cc Assembled. Currently I have a set of 1969 302 d0oe heads, and a set of 1965 289 heads, I heard both of those won't do it without spending a lot of money porting etcI was thinking of gt40 heads. Edelbrock E-Street cylinder heads are just the ticket. Fords great success with its powerful V8 engines is legendary. Cylinder heads are available fully assembled or as bare castings. Won't work with the 289 stroke. The "civilian" Boss 302 engine had a 4 bolt main block with screw-in freeze plugs and a forged steel crank. Sure there's someone on here that could tell you what heads you have would be better but with the right (mild) cam, good intake, etc. At idle when vacuum is the highest the valve guides leak lots of oil into the intake. 98 sold 8l F250hd efi roller engine? Neither was really that streetable but of the two the 70 had the smaller valves whick helped a little with the low rpm feel. 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. This page last updated: February 3, 2022. The 68 F code had 10:1 compression and made 210 bhp. The Edelbrock Flathead Cylinder Head is made of A356 aluminum T-6 tempered cylinder head. When you do that, you can see that the TFS head did substantially better than all the other heads above about 4,400 rpm. 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. Plus, they give you more power behind the wheel and in your wallet! The results of this test didnt really surprise me, except for one thing, reveals Holdener. We did this to expand the scale to show the differences in power near peak horsepower. This educational content is not intended to be a substitute for professional advice. Try the DZ 302 and see what happens! many cried in the various comments sections, to which the Ford faithful replied, Maybe against a BOSS 302! Well, Holdener was reading those comments, just like we were. Same transmission, run a 351W flywheel/flexplate (same as a C). I recommend purchasing ARP studs and guideplates for perfect rocker alignment. Get big power on a small budget with BluePrint Muscle Series cylinder heads! 2023 Power Automedia. These lightweight aluminum heads bolt up to your small block Ford and feature 190cc intake/60cc exhaust runners, 60cc combustion chambers, and 2.