I have a set of heads from a 1970 corvette. The casting number is 458642.
other numbers on the head are J 30 6. I have searched for over an hour to find the specs on this head but to no avail. I need to know thw chamber size and valve size, as I want to know if I should use these heads or try to get a good set of 350 centerbolts. I really dont need the 2.02/1.60 valves as a set of 1.945/1.505 are good for my application, I need the velocity not the flow.
I have a small stress crack in the other set of heads I have, and have this other set of heads just lyin about, they are polished and port matched to the gaskets for a TPI. Im just worried about compression as these are from a 70 corvette they may have 60cc chambers.
other numbers on the head are J 30 6. I have searched for over an hour to find the specs on this head but to no avail. I need to know thw chamber size and valve size, as I want to know if I should use these heads or try to get a good set of 350 centerbolts. I really dont need the 2.02/1.60 valves as a set of 1.945/1.505 are good for my application, I need the velocity not the flow.
I have a small stress crack in the other set of heads I have, and have this other set of heads just lyin about, they are polished and port matched to the gaskets for a TPI. Im just worried about compression as these are from a 70 corvette they may have 60cc chambers.
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