carb question (Holley)
I wouldn't mess with a PV rating at all until you get the idle issue under control.
2000 RPM is WAY TOO HIGH for anything short of a Pro Stock/Fuel engine.
At that rpm it's going have a real good chance to pull fuel from the boosters.
I don't know what the tune up is, but, start at about 14-16 BTDC for initial timing.
If you have power brakes, plug that line at the manifold too...