I have a 56 Belair and a rebuilt Carter 4 BBL. When I place it on the intake mannifold and start the car it starts but in a few seconds the gas start flowing out of the Carburetor. as I have said I had it rebuilt and check and I have taken it apart myself and really can't see any thing wrong. I have a Rochester also and when I put the Rochester on the manifold it starts right up and run great. Are there any suggestions for the Carter? Thanks Jerry....