Whenever I step on the gas from a stop, the engine bogs down and almost dies unless you let off the gas and ease into it slowly. Once your past the rough part, it's fine until you stop again. I have the 2150 kit installed, all vacuum lines are secure. I have 20" hg at idle. I have the return line connected with the check valve installed, 3-way filter, return line at 12 o'clock. The tank vent is open (will be putting the charcoal canister in tomorrow). I've adjusted the mixture screws, the curb idle and the float to spec (float to 7/16"... as in, I measured from the top of the bowl to the top of the fuel while the engine was at operating temp, however I shut it off right before so fuel would splash all over). I have the engine timed to around 9 BTDC. Curb idle is set to 650rpm while in drive. Choke is operating correctly and wide open at time of hesitation.
I'm running out of things to check. Any ideas?