Looks like all the cabs I have seen, rust in the front corners and the rear corners bent in. The '36 uses a different windshield then the 7 or 8, it has a different arc across the bottom or in the corners, I believe the top is the same. Doors should bolt right on, inside is all the same. Its for sure not a '38, they filled the fuel tank from the outside, and I believe '36 did to. I thought '37 was a one year only with fuel fill under seat, so maybe thats what it really is.
Joe
