Santa is going to bring me a new carb for Christmas but he needs help deciding on which one of the QF Brawler carbs to go with. This is going on a 73 Cuda with'71 340 that is currently relatively stock. J-heads, stock-ish cam, headers, RPM Air-gap, 727 Auto, 2400 stall, 3.55 gears. The motor will be getting new heads and a cam in the future so he's leaning towards a 750 CFM for the extra capacity. There will likely be a swap to a manual transmission but that might be a year or two out. Car is driven aggressively on the street and will see some auto-x and track days, but not much drag strip. Trying to figure out vac or mech secondaries. It seems that in the near term a vacuum sec would be the way to go with the automatic??