Diamond Pistons for 416 stroker

Engine started smoking after I made one hard run on it one day. Plugs showed signs of detonation and I was worried that I could have damaged something. I pretty much stopped running it right then and pulled the motor for tear down. After getting it apart, only thing that was wrong was that the rings weren't in the greatest shape for whatever reason. Still a little baffled about that. But engine guy said everything else was in order. The cam didn't have any wiped lobes. It was going to be re used but I decided I wanted a roller for the street driving. After honing, my bore was 4.075 so I could no longer use these pistons. Hence why I'm selling the pistons, cam, springs, etc from the old setup. I can get more pictures of every piston if it helps.