mostdef

basically what it sounds like...i have an 87 t top GT and am planning on swapin for a 351 but not really sure if my heads will fit....or should i just get new ones??? and if thats the case what would be some good but cheap heads cause im kinda on a budget

QUIKSVT

302 is a 7/16 headbolt ... 351 is a 1/2 headbolt... You'd need to have your heads drilled out to accomodate the bigger headbolt...

vristang

They will bolt up as mentioned above, but if they are stock 302 heads, it would be best to go aftermarket.

Stock 302 heads are kinda restrictive on a 302, they won't be that great on a 351w.
It would run well, just not near its power potential.


jason

SPE926

If the heads are aftermarket heads they will bolt right up since they are made for 351's in the first place.

hellas85stang

302 heads are cheaper when ya have no $ for after market...i had a 70 //302 pair and 194/15 valves and made a huge diff.. alotta diff in a 302 done up at 4-500.00 and aftermarket at 800.00 - 1500.00/// when ya are scrapin for cash on a 302heads,, the extra $ for aftermarket is alot more to come up with// if ya use a 302 get 69-71 or so years after that they are sare as on a winsor and bigger cc

greenstreak9205

like said above, they will work if you drill and tap them out and they're not the best performance if they're like the E7's. but with that tiny cc (compared to the stock 351) and some nitrous can you imagine the kinda torque that thing would dish out. nitrous+small cc head= lotsa torque

mostdef

ok thanks what if i use a set of e7 ported heads that have bigger springs and vlaves...i think the valves are 190's or something not sure have to find out....thanks

w8less

not if there stock. i think the biggest u can get in a e7 is 1.851/1.6 and that was close on my old heads.

go to a junk yard and pick u up a set of 351 heads if u can