Let me expand on my comments above. If you are going to do a ring job, take the ridge off. I was answering your Q that there was a ridge, very little, should you worry. No. New ring job? Yes. How good is the cylinder pressure? My 383 engine had 90,000 some miles on it, with a slight ridge. Cylinder pressure with the original timing chain was 140. I left it alone. That was 9 years ago and the engine is still running strong, no smoke.