What heads are on the 454 sc........Mercury has an odd way of naming their power

from what ive read they are gm cast 088 heads

Stewart

we ran 6psi on stock style 502 pistons and stock rods for 5 years

They are forged, essentially flat pistons and good rods. People put blowers on cast 3/8 bolt rod 330 hp engines...

So to recap...if I get a stock 502 put a 671 on it with roller cam roller rockers at 7 psi vs my 454 with same mods...what kind of power differences we talkin?? Don't know if I can swing heads at this point so lets just say stock heads on both

thanks

Stewart

10% displacement. 10% more output. maybe a bit more cuz you can run a little more cam...

So if I find one cheap enough...Cam suggestions?? also would the supercharger intake be the same for a 502 vs my 454?? not sure what heads are on a stock 502

also what compression ratio would I be looking at for a stock 502??

thanks

Stewart

also...any specific 502 I should look for?? would a truck motor from a boneyard work??

there are no boneyard 502's. they are boat and counter engines only. same heads as 454. same piston, rod, crank. all forged rotating assy.

I gotcha...I just ran across a place that is willing to sell me a useable rebuildable core for pretty reasonable and theyre only a couple hours away from me...so if I buy this with no heads would the AFR 454 heads that I was quoted for be the same as the 502 or would I need 502 specific heads??

thanks

stewart