This is what I have so far. I checked the bore of the cylinders and found that they were both pretty much the same. The bore from front to back is : top 3.999, middle 4.008 on one and 4.023 on the other one. The bottoms were 3.996, and 3.999. The side to side bores are 3.998 at the tops and 4.004 in the middle and at the bottoms. The ring end gaps are ; top .020, middle.018 and bottom .016 and that's both cylinders. I am thinking that they aren't out of round and I just need to hone them a bit more thoroughly and make sure the new ring gaps are opposite to each other on the pistons and I should be okay . The pistons appear perfectly round and are 3.972. What are your thoughts ?