I think your getting the cart ahead of the horse with your project. Have you determined if the bore is straight? How about is it standard size? Checked the ring lands in the pistons to make sure they are not worn out? I have a link below with some basic information to read about piston rings that may give you some insight. I'm not trying to rain on your parade, just don't like to see someone put alot of time and money into a project to have it end up being a mess. Don
http://en.wikipedia.org/wiki/Piston_ring
