What kind of pistons are these the block is .030 over. Trying to get an idea about compression with d3ve heads.

 

Stock replacement. No real way to tell for sure without checking everything. I'd guess not much more than 8 to 1. The problem is replacement pistons are just like stock pistons, too far below deck at tdc. Add the big dish in as well as the big open chambers and that's what you end up with.

 

yeah i wasn't hoping for high compression, i think the engine needs bored to 0.040, said and done i'm looking for about 9.0 9.5:1 its for more of a daily/ tow rig build. but i'm new to the 385 engines so i'm open to suggestions.