I'm not for real sure what ring gap I put this last time, but it seems like it was around .025 on the top ring. I was going by a truck repair manual the first time and went the lowest I could. That was the piston 5 pic. The second time, I went with the top end specs in the manuel and that is pic 7 with only 24 miles on the new pistons. When I got the Silv-O-Lites, it had a paper in the box that said add 30-40% more ring gap so I went with .025 with still the same results and that is what the machenist figured it up at. After this last time, I pulled the engine (almost a year ago, that is why I don't remember the specs), through it in the shop floor and went with a stock 350. Now I want my power back so it is time again. That 383 sure was a mud slinger.

Kodiak