He doesn't "NEED" custom bolts. A stronger option is to have the block drilled, and tapped to accept the 1/2" bolts (this is a lot stronger). Also if he doesn't want to go that route, there are steel sleeves that fit in the head bolt holes the reduce the size to 7/16".
Originally posted by Yamaha_R6 He doesn't "NEED" custom bolts. A stronger option is to have the block drilled, and tapped to accept the 1/2" bolts (this is a lot stronger). Also if he doesn't want to go that route, there are steel sleeves that fit in the head bolt holes the reduce the size to 7/16".
Yes. You can also put Cleavland heads on both the 302(called a BOSS) and 351W(called a Cleavor) with some minor mods. I personaly building a Cleavor myself.
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Black,79 Mustang mostly carbon fiber/kevlar body, M-2300-k brake kit, full roll cage, maximum motorsport suspension, custom geared 6 speed, 2 inch rear fender flares, 1 inch front, motor being built (no eta). Looks like the Mad Max interseptor and weighs about 1800lbs w/o motor (450hp 351w installed to move the car around)
Black, 82 Capri RS 5.0L, B303, 1.7 rockers, World 180 heads, +150hp N.O.S, Turbo coupe rear end, T-56(tremec tko would be beter), 80 cobra nose
Originally posted by GhostDog 5.0 Will I have problems with the push rods (need boss 302 push rods?) ?
Will the lifters and rockers be able to be used if I keep the stock cam?
There are the same head. The only diff. is the 351W has has bean drilled for a larger head bolt. Other that that they are identical
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Black,79 Mustang mostly carbon fiber/kevlar body, M-2300-k brake kit, full roll cage, maximum motorsport suspension, custom geared 6 speed, 2 inch rear fender flares, 1 inch front, motor being built (no eta). Looks like the Mad Max interseptor and weighs about 1800lbs w/o motor (450hp 351w installed to move the car around)
Black, 82 Capri RS 5.0L, B303, 1.7 rockers, World 180 heads, +150hp N.O.S, Turbo coupe rear end, T-56(tremec tko would be beter), 80 cobra nose
Originally posted by GhostDog 5.0 Anyone done this? Heard about this? Know this will / wont work?
Let me know, a buddy of mine said he is getting 351 heads put on his 302 but has to have custom bolts made to accept it.
On older 302's You had to change pistons, head bolts and pushrods.
1. Change pistons-To keep the compression up.
2. Head bolts-302=7/16" 351W=1/2" Alternatives-1/2' to 7/16" sleeves, re-drill & tap block or buy special bolts.
3. Pushrods-In between size needed. Alternative-Use a length checker and get custom pushrods made.
4. Good time to replace the valves in the 351W heads w/1.94 & 1.60's
All of the parts to do the swap use to be available from Ford dealers.
I'm not sure about 5.0 302's. They may require fewer changes.
Just slap the 351 heads on and go. The pushrods will fit just fine, no need for custom and that goes the same for the headers. Its a direct bolt on except for the sleaves you have to put in to make the bolt fit
Jim
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86 302 block, 670 holley carb, edelbrock air gap rpm intake, ported 351w heads, 1.6 roller rockers, comp cam xtream energy cam, MSD billet distributor, MSD blaster coil, MSD 6al ignition control, alum flywheel, king cobra clutch, 2 chamber flowmasters, HD 3 row radiator, and two 16" electric fans.
Black,79 Mustang mostly carbon fiber/kevlar body, M-2300-k brake kit, full roll cage, maximum motorsport suspension, custom geared 6 speed, 2 inch rear fender flares, 1 inch front, motor being built (no eta). Looks like the Mad Max interseptor and weighs about 1800lbs w/o motor (450hp 351w installed to move the car around)
Black, 82 Capri RS 5.0L, B303, 1.7 rockers, World 180 heads, +150hp N.O.S, Turbo coupe rear end, T-56(tremec tko would be beter), 80 cobra nose
351 Heads on a 302 ? 
