The truck is a mutt. 1952 5-window cab on what I assume is a 1950 1 ton frame. It has rear duallies and a dump bed . . . that actually works.
I got it home yesterday and got around to trying to identify it today. The number stamped next to the distributor 0249684 F54Z. The first character might be an O instead of an 0.
I would eventually like to identify the frame to find out what year it is. The engine has four bolts holding down the valve cover and a single pushrod cover. Doesn't appear to have captain's bars.
The VIN decoders I've tried say that the engine is out of a 1974 pickup truck. That seems kind of unlikely.