ss4f (vehicle ID from the door tag)

SS = 5100S ( 1.5 ton special )
4 = 1954
F = Flint, MI

Some states titled using that number and some states titled using the engine serial number (and some states used ether one in the same year - go figure).

What type of seat do you have (full-width or 1/3 for driver and 2/3 for passenger)?