400 budget compression HELP +++++

Like moper said, you are not going to get any quench unless you use closed chamber heads. What do you want from this engine? We are always trying to push the compression ratio to the limit on pump gas and risking some detonating piece of crap. Here is a 7.5:1 compression 400 that if we would have tested with a 4-bbl dual plane manifold like the Performer RPM would have really been impressive. Save the compression gig for the stroker.

The slug 400 on the dyno.