well im rebuilding my 305 and i was told that i should look at getting a head with something like 62cc to 64cc. and i was thinking what if i go a little smaller to a like 56cc 60cc well this bring up the compression alot more? and with that will it up the hp or suficate the engine more?

 

Which heads do you have? My 305 Camaro heads measured in at 58cc.