Just to let you guys know if you didnt already, edelbrock will be releasing aluminum cylinder heads for the big block buick. You will be able to buy these heads through summit. Edelbrock will be releasing these heads in march. Some specs are 68cc combustion chamber 215cc intake and 130cc exhaust. You will be able to buy them assembled or bare. assembled will retail for around 1600. If you have any other questions about these heads or parts that summit would carry just send me a pm.