Jim - are you sure the carb is correct for Chev? here's a note on the 2100 from CarbKing from another forum:
"Most of the YF production was for Ford engines, especially the 300 CID 6 cylinder which require more fuel. MOST (not all) of the current aftermarket repair kits contain a fuel valve designed for the Ford engine which has an orifice of 0.101 inches. The fuel valve as used in ALL of the YF carbs for Chevrolet had an orifice size of 0.081 inches. If you do the math, the valve for the Ford has an orifice size which is seventy percent larger! Using this valve in the Chevrolet carburetor will cause at best an over rich condition at idle, and at worst flooding and fuel leakage."
I'd suggest you try a different carb and see if the problem goes away
Bill
