I ran an engine like that one time and didn't cause an issue until piston rock came into play. I think mine was closer than that though because it lightly scuffed the valve relief area exactly like yours is showing, but never hurt anything. Ran it for a couple years till we pulled it down I found it.


67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174