Help with carb flooding.

Sometime ago I was having a problem with the carb seeming to be boiling when I shut off the engine and then it was difficult to start. So I had the carb professionally rebuilt - fixed the heat riser { new spring and it works smoothly } Removed the intake manifold and cleaned out the crossover exhaust ports - moved the fuel filter away from the carb to an area near the fender well. And after all that I still have the same problems plus a slight hesitation when I step on the gas at cruising. I'm at a loss as to what to do next. A friend said attach clothes pins to the fuel line. Anybody have any ideas? Thanks Ken