Hammertime, you seem to be on top of things with the horsepower and compression deal, so I would like to ask what you think. I ended up with 13.3-1 instead of 15-1 compression. I wanted to know about how much power difference do you think that is. It's a 632 with Dart Big Chiefs and two dominators. The cam is 284in-304ex @ .50 on a 114 LC. The pistons are shipping out on Monday so I can still change them if need be. Thanks