Well I dont know what to do now.. Replaced the carburetor, truck sounds fine when on the gas but stalls when you let off.. Sometimes when it starts to stall and you pump the gas the carb will pop and the choke snaps to full open.. I think I see a small leak between the bowl and the bottom portion of the carb but its hard to tell. No vacuum leaks as far as I know and the fuel pump is in great shape. I dont know what else to do..
