boss 302 aluminum heads boss 302 aluminum heads

The additional space improved the engine's breathing. Other than that it was OK. 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. 154-4207: Ford Racing Aluminum Valve Covers, Part # M-6582-Z351, SS, 12pt . When you shop through links on our site, we may earn an affiliate commission. 165 cc Intake. They pull much harder through the midrange than the 351W heads they replaced on my 302 Ford. For the Boss 351, the entire Cleveland engine was used instead of simply the heads. What type of heads fit a Boss 302 block? Put on a 351w in a 1979 Tbird. The runners are as cast and a bit rough. 1969 - C9ZE-6090-A or C This new design offers a 25-50 HP increase over current Cobra Jet heads, depending upon displacement and camshaft. 154-3702: SB Ford 302W 12pt Head Bolt Kit. One side opted for mild lift and more duration, and the other went for more lift and milder duration. My fault for not setting the intake on the engine to check my end gaps. Intake - 2.23 inches I think the higher RPM one had larger valvesand ports, right? Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! It was the most expensive of all the heads we tested. I have a Eldabrock Performer intake,msd distributor and 6al box and a 61mm bbk throttle body. Other Intakes >> Application. 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. The intake ports flow 382 cfm at .750-inch of lift. For what the (complete) Boss heads and a intake will run seems you would be better off just going with a good set of after market heads. THE NEXT ISSUE WAS VALVE SPRING INSTALL HEIGHT. 1/23 . Small Block Ford. Any who, this is a work laptop, and it started out pretty fast, but over time, it eventually slowed down. This particular evaluation only works, however, if lowest cost is the highest priority. But as others have mentioned there are modifications that must be done to make it work. Even the stock cam should peek higher than 5500 rpm. Fits factory 1979 - 1995 Mustang oil pan with custom oil pickup tube, part number: M-6622-BOSS302 NASCAR inspired front oil feed on both lifter galleys. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. The holes are also there in a 350 block and Felpro gasket as well as the 5073 head. 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. 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! The GT-40 cylinder head was produced in cast iron and aluminum, available from Ford Motorsport SVO and Ford Racing. Generator stud kit for 1938-48, use #8506. 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. Not the 2012-13 Coyote DOHC BOSS, but instead the genuine pushrod original from an era when Ford did the unthinkable repeatedlyand won! Thx. Marvin Shaw built us some nice HP heads for our later 1989 Super Stock Mustang driven by Charlie Ford who set 1/8th mile record under 6 seconds in 89/90 . The real question is, what do these factory motors make, and how do they compare to each other?. 035 (which I am using). Those of you who understand the BOSS 302 know Ford fitted these engines with a 780 cfm Holley but not necessarily because thats what they needed. 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. We evaluated each head on the flow bench, average overall power, and we calculated average horsepower-per-dollar. The store will not work correctly in the case when cookies are disabled. 300 HP wouldn't be far off. These heads are really impressive!!!!!! The "civilian" Boss 302 engine had a 4 bolt main block with screw-in freeze plugs and a forged steel crank. There is no flat spot and these engines will pull from 2000 against any rival including a Windsor. These heads use the same valves, valve springs, retainers, and 7/16 in. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. 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. Nevertheless, for a street engine, this head delivers excellent midrange power. If this becomes a bit more subjective by adding in power (and why wouldn't you? Exhaust - 1.72 inches. Combined with the big bore and short stroke, everyone thought these things wanna rev. The reality is that the head flow and dual-plane intake really limited the RPM.. To complete the Boss, we added an Edelbrock Performer RPM intake, a Holley 750-cfm, mechanical-secondary HP carb, MSD distributor, and a set of open dyno exhaust headers, and we were ready to rumble. It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. From new ones to the aluminum headed one I have in my fairlane now. At the time the first heads were done, I think only cast iron were available so they were furnaced brazed.If you sliced them, any shop that repairs heads could do the work. No mention of those holes in the instructions. This is my first engine build, let me know if Im doing it all wrong. 58 cc Chamber. 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. In 1970 the Boss 302 was a Camaro killer, it could go 0-60 mph in 6.0 seconds. I changed the thermostat so it would dump alittle more gas in her no problems so for. We got more than 450 HP on Fords dyno when we blew right rear tire and it took out Ford training board. Just A Taste is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. These were available in stock and have the right size intake valves so I grabbed them instead. The 302 has a 9:1 compression ratio, while the 347 and 363 have 9.6:1 and 10.2:1, respectively. The result of this engineering effort was the BOSS 302 engine, which became the Trans Am mill of choice for 1969-70 and beyond in SCCA competition. Next, we test a low-rpm cam and a high-rpm cam in the same engine to demonstrate the power differences. The heads are awesome and fit great! Age Group: adult. FORD 5.0L/302 Cylinder Heads. I also figured that the DZ 302s smaller heads, with better port velocity and more compression, would make more peak torque. Every time I put a bigger carb on it, it ran faster. More than 400 horses easy. Ford Aftermarket. First of all. Plus we used cam dial-in and it was only off a half degree. A stock Boss head will support way over 500 horsepower, where the Chevy will struggle at 400 horsepower. 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 . 154-3701: SB Ford Boss 302 12pt Head Bolt Kit. You have to rev it to the moon to really make any power. Edelbrock heads are available in two different versions, with either 1.94- or 2.02-inch intake valves. While the tunnel port wasnt a complete success, thats how the Boss heads came to be. Combine Edelbrock quality with excellent power and a highly competitive price, and the E-Street Edelbrock heads strike us as an excellent choice. 2. Assembled. The DZ 302 has a reputation for being a high-RPM screamer, and the camshaft is definitely part of that. Both engines are solid flat tappet cams, and the Chevy especially responded to changes in the lash. Because the new 351 engine had the same bore spacing as the 289/302, it seemed logical for Ford to adapt this high-performance cylinder head to the small-block Ford V8. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. They still have classes? This engine was built in the 80s by someone with way to much money. Like we said, if best power or least price is your only concern, then the decision is easy. Ever wonder what those camshaft specification numbers really mean and how they affect engine performance? The cylinder head is bolted to the engine block and sits above the pistons. [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. I really liked my 69 428 CJ. Peak power was good, at 349 hp, and torque is also reasonable. Not all that long ago, the small-block fan's only choice for Ford cylinder heads was the classic 351W Ford heads swap on a 302. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. Had to mill out some (- one hour with a Dremel), to get my stock distributor clamp to fit. 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. 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. Have you got the intake? I figured the Boss would make peak power. 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. They are rugged and ribbed internally and externally for more strength. 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. 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; This has been done and is generally called a Clevor (using Cleveland heads on a SBF). What I got was good, but the quality control person should not have let these go out the way they are. 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. Because the 302 Tunnel Port called for high revs in the 9,000 rpm range to make real power, racers scattered these engines all over racetracks across the country and left feeling defeated. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. 185 cc Intake. No problem coming off corners at low rpm in higher gears and the pull in the higher gears on top is amazing for what I paid for them. This page last updated: February 3, 2022. Edelbrock Performance Cylinder heads are manufactured of A356 aluminum and made in the USA for AMC, Buick, Chevy, Chrysler, Ford, Oldsmobile, & Pontiac engines. It took about 500 honest HP to break into the 11s with a little bit heavier car than your mustang. Also, the visual aesthetic is pretty plain, and the laptop doesnt have a sleek feel to it. The Edelbrock Flathead Cylinder Head is made of A356 aluminum T-6 tempered cylinder head. The Ford had slightly less compression, at 10.5:1, so out of the gate, Chevy had a little bit of an advantage.. No more dyno there. It features a forged dome piston to bring compression up to the original 11.0:1 compression ratio with the 64cc 186 casting fuelie heads. high power capabilities. The Boss used a mild camshaft, mild compression, and lots of head flow, Holdener says. I think I have seen afrermarket heads but cannot rememmber where. I personally know several guys with Boss 302s that have been secretly stroked to 347. Brand New. Fords classic 1969-70 BOSS 302 engine was a bold step forward after a miserable season in 1968. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4 reach with flat gasket seat. Absolutely no complaints, tons of flow and tons of fun. . Help keep from being nose heavy. But for perhaps a majority of enthusiasts, this evaluation may be too simplistic. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. Because the BOSS 302s heads sported monster-sized intake ports, these engines had a high-revving demeanor with peak torque and horsepower coming in around 7,000 rpm instead of the Tunnel Ports outrageous nine grand. ENGINE BLOCKS . Better than fighting with iron cylinder heads. Thesecret to a long life stroker is to add wieght to the crank so you can exterally balance @ 28 oz. Inline and < 15* valve angle such as World Products Man O' War 10* heads promote very good performance. . I just got a block that is 289 .30 over and I wanted to reuse my pistons I think they are sealed power 7006p (obsolete now). Fords great success with its powerful V8 engines is legendary. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4in. Click to expand. I HAD TO CHANGE OUT THE SPRINGS FOR ONES WITH MORE PRESSURE DUE TO VALVE FLOAT AND I AM ONLY RUNNING AN E303 CAM. Sign up for a free trial to MotorTrend+ today. Talk to Coast High Performance in Torrance, CA who sells quite a few 347 Street Fighter kits/short/long blocks and they will have some stats to back up quite a different story. 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 Fora platform includes forum software by XenForo. There was a guy named CJ Batten who would cut up 3 boss 302 heads and put them on a 300 IL6.The one I remember was on in a rail type dragster. The connection with metered networks (or connecting to your phones hotspot) appear to deteriorate over time, and causes this error. Im sorry guys but you somehow missed something there are boss 302s out there cranking out way more than what you guys are claiming. Bolts in anywhere a 302 will go with the right headers and pan. second time I have been disappointed with Edelbrock. For use on pre-pollution controlled vehicles only. Boss 302 - 1970 Boss. Ford 302 351C Cleveland 220cc 64cc Hydraulic Flat Assembled Cylinder Heads AT RACING WORLD, 5 Million Orders Shipped Worldwide Brand New $1,475.00 Seller: atracingworld-usa (83,202) 97.7% Buy It Now Free shipping 52 watchers Sponsored Ford 351 Cleveland 4V 254cc 64cc Cast Iron Bare Cylinder Head Brand New 1 product rating $587.80 It was honestly a guess on my part and the Tech had no additional information or opinion to offer. A tad shorter then a 351W but a little wider due to the size of the heads. Its all a win,win. (Image/Jim Smart) Although these are 1969-70 BOSS 302 heads, they []. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. There was dust and paper bits all over the keyboard and screen!! Great option. We learned on the first few pulls that we had too much carburetor with our 750 cfm Holley 4160 and too little camshaft. Greg has spent eighteen years and counting in automotive publishing, with most of his work having a very technical focus. This conversion was well documented and fairly popular when aftermarket heads were not available. Gurney Eagle : Gurney Eagle race heads : Application. Then Ill be looking for upgrades. The advantage was better flow because the intake was on one side and the exhaust was on the other. Not sure about the 5089. I used them with a Comp Cams 274XE cam and a QFT 600cfm carb. Fig. I have not been able to specifically identify because the stamp on corner does not mach up with what it should be. Finding a Street Boss intake likely wouldn't be too difficult as multiple manufacturers have cranked them out over the years. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. I am running them on a 302 and purchased this set for a 351 build. The stroke difference between the two engines amounted . 125 of gap at the front and rear ends and you are running a blower or a turbo then I would suggest making some spacers to take up the gap on the ends because anything over. Pic 2 is a spot next to a water port on the intake surface where it looks like the facing tool tilted some. Ford's 302 crate engines use Boss 302 iron blocks. $1,692.99. They are very capable iron heads. The Cleveland type heads are used in the 302 heads. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Works with most standard components. The BOSS 302 Registry is not affiliated with the Ford Motor Company. . 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. 1970 Intake - 2.19 inches Exhaust - 1.72 inches. It is now becoming sluggish, and I get LBSOD issues frequently because of the wifi. reach with flat gasket seat. Well, I got about 500 miles on the engine now and couldnt be happier about the build. Fords incredible 1969-70 Trans Am BOSS 302. Raced and owned quite a few Boss 302s. IF YOU DO THIS BE SURE TO USE PERMATEX #2 ON THE INTAKE STUDS. The intake is off a 1965 Shellby. 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 . $ 5,595.00 Learn More. loading. 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/. Boss 302 blocks are used all the time for Windsor headed performance buildups! Stroking an engine is not going to reduce your engine rpm. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. But, I just came across this website and happened to ask about B. Sizemor's 6. All Rights Reserved. I SENT THEM RIGHT BACK. 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. Keep the RPMs under 5,500 and valve lift is more like. Above you see a casting with a D1ZE part number. either way, Im so thrilled with this product that im picking up the 205s for a fast engine build. . When it comes to the valve events, Ford and Chevrolet took two different approaches. These Ford heads tied with the Edelbrock heads for third place in average torque and were extremely close to the RHS head's second-place power level. http://fordsix.com/forum/viewtopic.php?t=33048, 1971 Ford Maverick - Budget 10-Second Turbocharged Maverick Coupe - Car Craft Magazine. So your wrong. Boss 302s did indeed have 1.73 ratio rockers from the factory. I am through with their products. How can you call it racing if you're putting the brakes on before the finish line? It came with aluminum heads that were way too big for the cam and my use. For those who consider swirl a detriment to producing power this is a positive thing. Reportedly designed by a drag racer and tinkerer named Sherman Sligh, the Boss 300 is engine design gone mad. That may or may not make your ultimate choice any easier, but if so, you can thank us later. The Good and Bad of the head bolts on the SBF is that their are only 8 of them. but thesell work on a large engine and flow, too. While it only had .480-inch of lift, that duration would really allow the RPM to climb. These new aluminum hemi heads will bolt directly to any small-block Ford from a 289/302 all the way up to 351W as well as Cleveland engines. They are also cast with combustion This includes 260, 289, 302, Boss 302, 351W and related variants. stud kit is of poor quality everything else in my order was good quality. DONT USE ANYTHING ELSE OR IT WILL LEAK. BluePrint Engines stand in front of the class, offering both performance and cost-conscious enthusiasts a powerful alternativeMuscle Series cylinder heads. THe new heads will have the same bolt-pattern as the original 6. 1.90/1.60 in Valves. Cross Boss 302 Mustang off highway use. extreme amount of burrs left all around the rocker shaft mounting pads. 2023 Power Automedia. NOS 1969 1970 Mustang Boss 302 speedometer. THE FIRST SET I PURCHASED WERE LIKE THIS AND I INSTALLED WITHOUT CHECKING THEM. Factory was1.73 IIRC. 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. Alum. Im extremely disappointed in this blog.. 10 years????? Bob Perkins(WI) located it and restored it to original shape and build special plexiglass trailer for it to display. After its time on the pump, the DZ 302 posted 357 horsepower at 6,700 rpm and 333 lb-ft of torque at 4,300 rpm. Always interested in how things work, he enjoys sharing his passion for automotive technology with the reader. Especially for the price, I would buy them again in a heartbeat. Do 302 cylinder heads increase RPM? 18 Ft/Lbs - Aluminum Heads. 015 AND THE REST WERE. Due to the larger Cleveland-style heads, the Boss 302 weighs somewhat more than the normal 302, tipping the scales at 500 lbs. Im trying to build my 289 on a budget and saw a pair of Boss 302 heads online for $400 and thought why not. The BOSS piston was a unique item, configured to use the 289HP rod with the 302 stroke. The intake valves all have. The Tech was nonchalant about this and stated these are a lower end part. 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. The body is lowered 11 mm (0.433 in) up front and just 1 mm (0.039 in) in the rear to give it a more raked stance designed to recall the original. 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. So it can already be made to haul. Pair. Any advice would be greatly appreciated. 1 on Pg 2 instructs the used to drill 3 holes if a 400 block is used. 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. The DZ 302 used a 1.5:0 ratio, while the Boss 302 head used a larger 1.72:1 ratio. Needless to say the head kicked ***. Currently working on a 1970 Mach 1 project. Ah now Plummer - it's not a secret if you post it on VMF!