I would think busted rings pistons coming out more than going back in. It depends on how big the ridge is which you will be able to see once you stone hone it. Then again any ridge will not seal rings. Mopar blocks are noted for being very hard and wear resistant unless they were run with dirty oil from not changing the oil on a regular basis. You will know once you stone hone it. If your pistons come out hard because of the ridge or they get stuck, then its time to use the ridge reamer. I have never had to use one on a mopar, luckily.
