I agree with the guys here. measure up the crank and bore. check for out of round and taper. most mechanics usually will tell you once you remove a piston from a bore you have to at least put new rings on and hone the bore. reason, you probably have a slightly egg shapped bore that the rings are "fit " to from years of wear. you will never get them back in the same way. so they have to wear in again to fit and you'll probably have oil burning problems.