How do I get 500 Hp out of a 454 with peanut port heads?
yankee phil, What octane gas do you plan on using with the 30cc pistons? A set of 27cc pistons using 781 heads with 119cc chambers would give you 10.3 compression ratio. To use 91 octane pump gas use a 18cc piston it will give you 9.5 compression ratio. I wouldn't go over 9.5 C.R. with cast iron heads if wanting to use pump gas. Some people recommend not going over 9:1 C.R. Big block are more prone to detonation than SBC. BTW if you do change rod bolts and do the honing on the rods they will have to be resized again.