Here are pics that I couldn't attach in the PM.

As you can see, this truck shouldn't be used as the "standard" for any sort of panel fitment. It might help you determine how far off your parts are, though.

The distance between the fenders, measured flat against the firewall is 56 15/16".

Across front in the location pictured, the measurement is 30.5".
Attachments
IMG_20230606_151253.jpg (101.71 KB, 195 downloads)
IMG_20230606_151316.jpg (83.95 KB, 195 downloads)
IMG_20230606_151641.jpg (61.67 KB, 195 downloads)
IMG_20230606_151644.jpg (63.22 KB, 190 downloads)
IMG_20230606_151910.jpg (64.08 KB, 191 downloads)
IMG_20230606_151916.jpg (68.43 KB, 190 downloads)

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)