This is with a 2000TC running 9:1 2200 pistons with HIF6 carbs. I had a great weekend up in Mass for the Nortb American Rove. Managed about 600 miles round trip with no issues. Got home Saturday evening and noticed that she has a slight miss every second or so at idle with a popping at the tailpipe. I know I have to repair a crack on the exhaust manifold that I’m pretty sure got worse on the trip home. Could this be related? Power seems good still, idle is smooth apart from these occasional misses. My other concern is maybe this is the beginning of a burnt valve. I plan to whip off the manifold, weld the crack between the 2nd and 3rd cylinder pipes and try and anneal somehow Any thoughts?