A lot of work but worth it. Based on the color, it may have been from the military,
forest service, or other government agency. Look for a data plate riveted on the dash or body.
It also has a 57 hood and some type of mount pads welded in for an engine swap.
Fred
the correct 55 is sitting on it now.. it came with two!
The “olive drab” paint color and stenciled “TP26” leads me to think it might be a former Army fleet vehicle.

The stencil IMO is definitely to ID tire pressure from my experience with Army fleet equipment.
Welcome to Stovebolt!

I’m pretty sure you’ve been bitten by the Stovebolt bug - lol!

Hmm.. interesting.. could be - would love to know factually if this was an army vehicle at some point. The only VIN I have is stamped on the frame.