Different carbs on dual tunnel ram

In the AVS2 instructions I had, edelbrock recommended using a manual choke on one carburetor only and wiring (or mechanical fouling) the other choke open on dual carburetor setups. They have a pair of 1903 manual choke carburetors (500cfm) that come pre calibrated for a two four setup. When you get to where you are talking about going with a 4 inch crank and high lift cams with good heads, it’s time to graduate to a pair of sideways mounted 4150 Holley type carburetors, though.