I have a 455 out of a 72 olds it has a set of g heads, are they a good set of heads or should i get and after market set of heads? Does anyone
know the cc of the chambers and size of the valves. Does anyone know
the stock comp of this 455? I'm going to build it and try to get around
9.5 to 1 so i can run pump gas.
Thank you in advance

 

Use the G's, put 2.07 valves in them and use the L2323 Speed Pro piston. Depending on deck and head cc that should get you around 9.5-9.75:1.

Jmo

 

Thanks for the info. I s their a place where I can get a crank kit to stroke this motor?

 

Eagle, or offset grind the one you have.