Classic/Antique Car Repair: Studebaker 1950 Carburetor, adjustable fuel regulator, vent hole

Question
I have a 1950 Champion Studebaker, straight 6 cylinder engine with a WE-715S Carter Carburetor. The engine runs very nice. My problem is slight flooding from the carburetor about a minute or so, after I turn the engine off. I tried to do all kinds of adjustmens on the Carburetor, including lowering the float as much as possible without starving the carb from not enough gas in the bowl. I even went and bought a factory rebuilt carburetor thinking that this will resolve the problem. it did not. It leaks or floods from the vent hole, down to the base, about 1/2 a cap full, after I turn the engine off and then stops and becomes dry. I replaced the gas tank cap and checked it out. It is vented properly. I looked inside the carburetor and it looks like the main discharge nozzle keeps dripping gas in side the carburetor. Some of that gas goes on the side of the carb and finds its way to the vent hole at the joint between the main body and the base. Any suggestions? Thanks.

Answer
I had a similar problem on a 3-2 barrel setup and the only way I ever resolved it was to install an adjustable fuel regulator on the supply line. It literally had a knob to adjust the fuel to carb. I also could find nothing wrong with the carbs and it had to be bleed by from fuel pump long after it was off. A restricted reutn to tank might have helped, but wasn't feesible in my application.