360 carburetor choice?

Brook [ post #20 ].

Yes, you can adjust the WOT position of the TQ sec blades to control CFM. But because the blades are so large, this will affect distribution & outright hp. The Mopar bulletins has the sec blades set at 81* at WOT for a dual plane & 88* for a single plane.
Better to stay with the factory setting unless experimentation on a dyno shows otherwise.

The air valve automatically controls overall air flow. If the engine needs less airflow, the AV will open at a higher rpm & vice versa.