I'm not sure what you mean JW51. The filler neck is anything but horizontal.

I've never had a problem filling the tank. Don't use the latches on the pump or it will fill up too fast and spurt out.

Hold the trigger by hand and don't shove it in all the way. Air needs to escape.

This procedure is true for all my old cars that will puke if you rely on the automatic shutoff.

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)