Read through an earlier thread on here and it seemed inconclusive. Last time I put together a motor (circa 2006) there had been a switch in thinking from smaller second ring gap to looser second ring gap. I went with looser second ring gap per my engine guy's recommendations. The two sheets below was the information from when I built that engine. The yellow sheet is from JE Pistons, and the other is from Total Seal. Currently putting together a street strip 351c, PBM rings. Their recommendations looks like a direct copy from Total Seals shown in the pic lol..