Joe:
Aha! That makes sense. I ran the calculator for a 250, at 83% VE for a mild street motor and a redline of 5500 RPM. Came out only about 400 cfm.
So changes to the motor will necessitate more fuel and air, hence a bigger carberator. A bigger carberator doesn't force more air and fuel into the engine to produce more power.
You are the man!
