Well this is where it gets interesting...
The VIN(20JPA27521)plate, cab (vent windows, one louver vent), and engine (JBM code) are clearly 1951.
I also have a book of old photos of the truck unrestored that indicate the cab was not replaced, and the truck has low (<30K) miles. The driveline certainly appears to not have been taken apart and the frame is all solid and riveted....
But the title (not original) was "mistakenly" (per the previous to the previous owner) labelled as a 1950, though the VIN is listed correctly, so who knows?
In any case I plan on keeping it all together with mild safety-related mods and need a strategy for the rear brakes.