Weird issue with AFB

Congrats on using the AFB, a great carb, Carter or Edel.

[1] If you have uneven t'slot showing at idle then the shaft is twisted or blade bent. The main air bleed & emulsion holes in the boosters change the jetting requirement. Eg, the 625 AVS carb has EXACTLTY the same size pri venturi & bore size but uses a 089 pri jet & a 66/55 met rod. So the first step is to ensure you have factory jetting.
[2] Something wrong with your measurements. If you got zero vacuum off a manifold port [ at idle? ] it means that port is blocked.....or the engine was not running.
[3] 5" of vac on the PVA port. This could be a few things. Long-ish duration cam that requires more idle air, blades open further, exposing PVA port. Insufficient idle timing.
[4] Need a complete run down on the combo to give more meaningful advice.