This is the original eng, and I want to wring it out for as long as it will go. I know exactly what I have with the rest of the engine. The bearing are good as new. And I know why the rings are letting go. It blew two head gaskets between #1, and 2, and both times all the water went out the tale pipe. I limped home both times, and it got hot, so the rings have just lost their tension. I'm just wondering weather to use standard, or file a set of oversize.