Serial Numbers

[Paul Heise]

Hello all, I found a census number on the side of my doors ( 42 F15a ).* I also don't have a serial number on the frame or on the gear box (must be a rebuilt?).* Can anyone tell me the relationship between the census number and the serial number, if any, and if they could be the same.* The number that I found was 55-XXX, only a five diget number.With all that in mind, does anyone know where I can get a set (x3) data plates, new or used? or someone that makes them for a Ford.