Found out some of the specs for the 428. 69 block with 69 GTO C heads [d-port]62 code, 2.11 and 1.77, 72cc, ram air 4 camshaft, GTO oil pan and melling 60lb pump, screw in studs, stock or street dominator intake. Should be about 10.25 to 1 compresion, so I should be able to get by with mostly pump and a little race fuel. Hoping to be around 425 hp 500 tq. Sound good or am I dreamin???