I forgot to ask if you have an inline filter installed between the pump and carburetor? If so, it could be clogged.

The average human is only capable of producing about 2 psi if he blows as hard as he can. If you can't blow through your fuel filter, neither can your fuel pump. If it's even moderately difficult for you to blow through the filter, a properly functioning 1947 fuel pump will also have trouble.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)