Quote: I would have to remove 5cc of material to get back to 13.5:1. I think this may be a custom piston deal that's why I was looking a chevy pistons. thought I may be able to save some coin that way.
This is what an additional 3-4 combustion chamber CC's looks like. Did you have the block sonic tested? I have seen big discrepancies in wall thickness, etc. with 360 blocks over the years.
