It is a .30 over bore. It has the sealed power flat tops with 4 reliefs. I believe the rods are the chevy pink rods. When I bought the motor years ago it had from what I can remember the crane fireball heads with angle plugs(2.02/1.60). I remember the guy said he built it for a 55 chevy pickup. It sounds like a lot of work to run that cam. With what I have done to the bottom end what can I look at getting out of the motor? Should I look for another cam, if so what one? I will be running a turbo 350 tranny and a 9" rear with a 350 ratio. I will probably put a new gear and bump it up a little.