The engine in my D-coder is a stock long block with a Cobra intake, Autolite 4100 carb and JBA shortie headers. The only time I had a intermediate RPM stumble with the 4100 was when there was some debris in the intermediate circuit. Otherwise, flawless. I have it set up for a long pump shot, since the car has a stock converter and 3.0's.
Race car is likely irrelevant but has a 3310 (780cfm) Holley with a ton of modifications. Reo pump, dial-a-pod and a bunch of internal mods. Engine is a highly modified 351W.
I've never run Carter-based carbs so know very little about them other than helping my Mopar race buddies sort them in the distant past. I know there are different jets, metering rods and springs. Each plays a role in the overall metering scheme. Beyond experimenting, I really can't offer you any definitive advice....
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