340 pistons in a 360?

I've done several of these conversions but... You have to use 8.5 72' and later 340 piston. In stock form the piston exceeds the deck height by .020-.030 thousands. It all depends on block and how squared it is or isn't. I tapered the piston edges and had to cut deeper valve reliefs to put in a 500 lift cam. I also did alot of head work to increase the pocket to allow the piston not to make contact with head. With all this work it still had tooo much compression and couldn't truly run full advance. Seriously it could of run on alcohol. My advice is Dont do it. Pay the money for some kb's. You would make more power with less compression running full advance not to mention the cost of racing fuel vs. regular pump gas.