1947-50 doors had different side window (no vent) and latch/striker-plate (in comparison to 1952-1955)
1951 doors had a vent window but a different door handle and a different latch/striker-plate (in comparison to 1952-55)
1952-1955 had the same side-doors, latches, and striker plates
You should be able to interchange any 1947-55 door on any 47-55 cab, as long as you have have the right latches and striker-plates (the door opening dimensions did not change).
