305 Heads???

[greasemonkey]

Originally Posted by Koll

Ummm....The 305 heads cannot fit on anything above 327. The bore size is different

:smt017 ???? the 305 heads won't fit on a larger bore because the valves that are too small will hit the bigger bore how? you're right about the 350 heads(if they're 2.02/1.60's)valves hitting the 305 block. 1.94/1.60 heads will fit fine on a 305 though slightly shrouded near the cylinder walls.

don't use factory 305 heads, the only good thing they have to offer is a small combustion chamber. there are entirely too many affordable aftermarket and factory options for an excellent flowing head with a small combustion chamber, and if you're desperate for compression use a thin head gasket.

[89VetteFromHell]

Originally Posted by Koll

Ummm....The 305 heads cannot fit on anything above 327. The bore size is different. I was going to put a set of 350 Heads on my LO3 305, but found out the valves would hit. You are really killing that engine. If you want to keep the compression ratio up, then have the 350 heads milled.

305 heads fit on a 350 nicely and i have seen it done on a low compression Blown motor