Amervo dont take this wrong. But read Jim Hands Book on How to Build Pontiac V-8 Max Performance. Kauffman, Butler, Hand are no arm chair designers. They know there stuff. I have one of the Butlers rotating assembly kits. Talked to Jim Butler on the phone a few times. He asked me exactly what I wanted. And he told me the #s I would have. In both 1/4 mile and hp and tq Dead freging on. Except I run a 410 gear. 2100 kit 900 machine work and assembly. I dont know nothing about those crate motors. Except you can get a Hemi for 10 grand. Bill