Yes, the stock block is used. Stock cubes is 370. We put a 4.080 crank and a 4.080 bore in their to achieve 426 cubes. The CR is a very mild 10.3:1. The cam is a 228/232 115LSA

LS1Nicky

August 17, 2008

was the stock block still used? i dont know how many cubes the 6.1 is, thats an impressive setup and it looks like it really puts down some power for not having such a radical cam, whats the CR?