Calling 340 with Holley 650 dp

Your erratic timing numbers likely are not helping the tunability at this point. You’re also going to fight detonation with 12:1 on pump gas if you try to bring the all in part of the curve in as early (3000) as you are. For the sake of easy tuning, you could probably lock the timing (set every square in the table to the same number) at like 24 for now and get the carb closer then work on the timing curve.