allen if you plan to put an aftermarket intake on it just make sure its a low profile intake and you should make up the differance in height......if i remember correctly the 351 is about an 1 1/2" taller than the 302 block.......
the 302 and 351w intakes do not interchange. this is because the heads are further apart on the 351. no problem with the height of a 351w in a mav, just hell on changing the spark plugs. but it can be done. probably need headers for a 351w as they hug the engine a little more. there have been discussions about this before. check the archives. when i switched back from a 351w to a 302 the 351w headers hit the motor mounts so i got a set of hooker competition headers.
351W Thanks for all the additional info Guys. I have a one other question. Will the pulleys had brackets for power steering and alternator and air conditioning unit switch from a 302 to 351 or will I have to find a 351 with all the accesiories that I want to get pulleys and brackets. O.K. I lied one more, is there any place were you can order new items. Let me know. Thanks Allen Small
ford makes a swap kit that places the bolt hole over the center of the Freeze out plug on the 351w mine i got form a bronco parts place for the ALT and power steering the pullys should work if the 351w balencer is a 4 bolt:bananaman
I have a 1971 maverick that had a 6cy 3spd...and now has a 302 which screams and a c-4 with a performance rebuild. Engine .484 Comp xreme energy cam 9.5:1 Hyperutectic pistons edelbrock performer intake edlebrock 600 cfm carb msd 6a box msd blaster ss coil msd pro billet distributor msd 8.8 mm racing wires my plans are to put a rebuilt 8 inch or 8.8 rear end wioth 3.73 gears (posi of course) upgrade the heads ( stock 302 in it now from a 77 ford f-100 truck)the heads have been completely done over with 5angle valve job and stiffer springs.. but i need more. i want to run roller rocker and was thinking about getting a set of 351w heads and making them do the work. they flow more air and aire heavier duty than 302 but has anyone done it and can give me some pointers on the head selection process, what rebuild to get done, and how big a cam i can go.. i want a 510-530 cam but not sure on what specs i want. i know i need more power car ran 14.523 at 95.53 mph 3 weeks ago at SIR. best run ever.
Remember that 351 heads will have bolt holes to accomodate a 1/2" bolt as opposed to a 7/16. (EDIT: I guess this was already mentioned. Not sure how I missed that )You may need to get reducers to go into the holes. Just an FYI. I would look for some GT40 irons heads over 351 heads as they flow very well, and can be had in the same price range. AC
In 1969, the forst year of the 351w, you could use the same brackets, as Ford use a little adaptor on the head to make them work. In 1970 on, the brackets changed. Since you have a 1969 engine, 302 brackets should work for you.
Many aftermarket heads have the larger bolt holes too. For use on 302 block, special shouldered bolts are available.
Just an FYI. I would look for some GT40 irons heads over 351 heads as they flow very well, and can be had in the same price range. Someone mentioned that the plugs angle is different....is this correct or is it for a diferent set of heads I'm thinking about
Why are these folks recommending a head swap? If I read the post right, you are looking to use the entire engine, or did I miss something? Those heads are the best stock W heads they made. You have a good engine there. Use the whole thing and do a swap. Otherwise, use the heads with aftermarket bolts on a 302. If you swap in the entire engine, you will most likely need swap headers. The engine is too wide to allow for 302 headers in the body, even though they will bolt up out of the car. Use a Torker 2 for the 351w for a performance intake under the stock hood. This intake is nearly stock height. The only other intake you will get that short is the Performer, but it sucks performance wise. The Stealth or RPM are a tight fit. The RPM A/G for the W is as tall as the Victor! Good luck Dave Btw: For around 300 bux and a set of .030" over 302 pistons, you can add 42 cubes to that engine! A heck of a good deal. Btw 2: Aftermarket rod bolts are manditory in your engine. A seriously weak link in an otherwise tough engine.
Anyone notice that this thread was started in January of 04. If you run 351w heads on a 289 or early 302 you need to drill the steam holes in the heads to prevent overheating.
Not a engine swap I have already done the engine swap...i swapped a 302 for the 170 that was in it....now i am trying to get more power... i heard that a 351 w head will breathe better and so i wanted info on it.. i had heard of the gt40 heads and wasnt sure what the best way to go was.. i want better heads than that of the stock 302 that was out of a 1977 f-100 truck...unless all heads are created equal...and i know that just isnt true... so please... what heads are the best ones to get for a 302 that is in my maverick..i want it to breathe better and be able to run a 512 cam with out problems. and something that can handle nitrous later... but not for a while... i want to get into the 13's first..then play with nitrous thanks Simon
simon, i run a 302 in my maverick with edelbrock performer heads. the cam is about a .540 lift if i remember right. i ran the 351w heads before. i put over $800 into them. for a couple of hundred more i got the aluminum heads which also helped me to lose some weight. did you weigh your car. mine weighs 2730 and runs in the 12.30s at sir. i ran 12.02 last month at firebird. are you going to run the team sir points races? first race is feb 5th. look me up. blue 71 grabber, usually pit across from the rest rooms about 3 cars in.
my car weighs 2930 with driver...and i weigh about 210 give or take.... and i ran 14.5 at SIR during the free test and tune day when they re opened after resurfacing.... i saw 2 others mavs there..... a red one that ran 10 seconds...and a black one what is the team SIR points? email me at stmanser@cox.net its easier for me to check that than to do the forums... i wanted to get the aluminum heads but i was discouraged....the guy told me that iron heads hold their shape better and can handle compression better.... i know that... i did sheetmetal in the military for 14 years... your performer heads....are they rollers? and a roller cam? i dont have the money for the roller set up so i am relying on the good old fashion pushrods.... and i am certainly getting tired of adjusting them... i just put new nuts on them that i bought from townsends, some of the nuts didnt having the locking mechanism in them so i had to make them lock...and i am already starting to get a little noise.... a little noise is normal....i just hate hearing it... and what will a 540 lift cam do for me? i am running a 2500 rpm stall hughes convertor and a c-4 rebuilt.... will it tear my car apart...considering the car is from kentucky and has some rusted floor boards that i just cant seem to get fixed without having to sell something expensive.... i love my maverick...but i am really starting to question why i keep it...then i drive it..and say i will never get rid of it ...i just hope one day i can run 12 secs...
The TFS twisted wedge aluminum heads are a good bang for buck heads.Aluminum will let you run a bit more compression on pump gas;the tw's will out flow most aftermarket heads(w style,stock exhaust location)up to 550 lift.If thats too much,get a set of stock '87-'94 mustang gt heads(cast # starts with e7)port out the exhaust side,they perform well for production heads,my '75 weighed 3350 w/driver-5.0,b303 cam,ported e7's,3500 stall & 3.55 gears..ran 14.33 @98 in the 1/4.
