[uncle max]

Jan, I looked in my logbook and found that I sent your two carbs with .043" main jets and #69 powervalves...
This has nearly always been the combination that makes most small to mid size flatheads happy.
With this stuff they call gas today, my theory might be subject to change.
Check your fuel pressure, because if it's too high, your carbs will think they have larger jets!
If need be, PM me with your address and I'll send more jets. Free.