having to feather it, as in, pumping the gas when starting off? sounds like you need MORE pump shot.

I would start out by changing the size of the nozzle on the pump shot, one or 2 sizes bigger so that you get more fuel, faster. then you can start playing with the cams on the pump shot too if you need more duration of pump shot.

I had the same problem on a holley DP. I had to pump the gas 3 or 4 times to get the RPMs up without stalling it. went up a few sizes in nozzle, and also changed the cam so that I got a longer duration shot, and the problem went away