yeah but that 1/10 of an inch makes 35 hp, and then add to that the higher lift cams, you're not far from 280 hp. but you're right if you're going to go to all the effort of doing a tear down I might as well reasearch another way of making more displacement. but I have a feeling that the 3.7L sleeve and piston kit is tatally maxed out, otherwise someone else would have a larger displacement motor on the market. maybe I'm wrong.