>If not, how feasible is it to machine a .030 over piston to .010, and find a quality set of rings? You can't just chuck a set of pistons in a lathe and cut them to a smaller size. The skirts of a piston are egg shaped and tapered. It has to be done in a special machine. Just about any of the "name brand" Piston makers will make you up a set of .010 over. Be sure to tell them if they are for street or competition, different material. If you want the best rings I would call Total Seal. They have always been good to me. But hey,, that's just me!! Bruce Hevner