RPM is 2-2.5k through 3-3.5k RPM at light throttle. I think there are some carb issues. If I take up to 3500 and jump on it, it stumbles and then pulls hard.

Would need to check reluctor gap. I am beginning to think this is more of a carb issue than a timing issue (at the moment).

Going to baseline the carb when I get some hours to mess around. Idle, transition slots/blades, fuel level, check for vacuum leaks, etc. etc. I know where the ignition timing is, so that is good.