I’m having the same problem with my ‘57 3200 with a rebuilt 350 topped off with a Carter 9635S. I installed a glass fuel filter and can see the the fuel drains back to the mechanical pump. After setting a day or more, I have to keep pumping it until it fires. I’ve read that some pumps have built-in check valves on the inlet and outlet sides, but apparently mine does not. Might be your problem also.


1957 Chevy 3200
Daily Driver
PS, A/C, Tilt column, Rebuilt 350, Rebuilt TH350, Reupholstered Bench Seat, sound proof/insulated, LED headlights/taillights/backup lights/interior courtesy lights.
Follow in the DITY