Good points, Jon, and I can see the advantage of having small venturis with increased velocity over a single big one with lazy airflow through it. That's the concept the triple-stack venturi and the tiny primary barrels the Quadrajet uses. The big sixes (Ford, Chevy and International) were never really intended to get good fuel mileage, as they were primarily used in medium-duty trucks hauling max cargo loads on a daily basis. I wonder if anyone has ever tried using a Q-jet on a 292? One for a 305 Chevy or a 307 Olds engine should be in the ballpark for initial calibration, and the adjustable air valve spring makes it easy to adjust the tip-in point of the secondary barrels.
Jerry
