'38 Tonner Spare Wheel Carrier???

[revenski]

I’m looking for a little help on mounting of the spare tire on my 1938 tonner. The tire came mounted on the driver side with a spare wheel carrier that I suspect is not original. I’m attaching some pictures of the truck as it was when I bought it and of the wheel carrier. The carrier is 30” long and 5” wide at its maximum width. The repair/ fabrication work on the bed has been significant and is just about complete, so I need to consider mounting of the spare before I go further.
1) Pictures that I have found of ’38-’40 tonners seem to have had the spare mounted on the passenger side of the bed although I have no evidence of that on this tonner. Mine was on the driver’s side. What are your thoughts?
2) The part number for the spare wheel carrier for ’38-41 tonners in the Ford Green Book is 81y 1433-B. Is that the part I have? If not, what does it look like? I haven’t been able to find anything other than a picture in Mac’s for a ’40-’41 half ton spare wheel carrier which is quite different.
Input appreciated. Thank you.