1949 Plymouth Special Deluxe

Friend of mine has a '42 Special Deluxe with a Carter Ball and Ball that was always had to start. Carb had previous been rebuild by someone but when we tore it down found it wasn't done right and I think some of the check balls were missing or in the wrong spot. Rebult the rest of the fuel system too (tank, lines, pump) and now it starts right up even after sitting a while.