A couple of weekends ago I accidently timed my engine at 66 degrees timing and made 2 runs. I havent't run the car in a couple of years and I forgot where my timing mark was.It is a small block 416 with 11.25-1 compression cast iron heads and moly rings I am running 110 fuel. I was running exhaust and didn't hear any detonation. It slowed down a second in the et and 12 mph. After re timing at 36 it runs fine and ET is back where it usually has been and have not seen any smoke from tailpipes. My question is would it hurt the rings or piston ring lands?