lt1s10, I can get a pic of each piston on tonight. The first time I built it, I went with the lowest ring gap I could,( the tighter, the longer it is going to last, My thinking). The second time I went with the upper end of the scale. But the third time, I added 30-40% to that and still the same problem.

I know this engine hates me, or loves to eat at my wallet. I've built a dozen engines with out a single problem, but all of them has had a good ol Holly on top.

Kodiak