Originally Posted By Chuck@Best_Machine
Are you sure the radial on the old ring is .069 ? A normal backcut 1/6th ring is .170 and a normal non back cut is around.200 If you really needed a 1/16th (.062) backcut to .069 it would almost be square. If this is the case you have a piston problem


I believe that you are correct, Sir. My mistake (I corrected my original post). A good reason why mechanics shouldn't try to be machinist when its late and they are tired and annoyed. Thank you.

Brian