I have one on each side of the bed sides, that I think are spare wheel mounts. Having never seen the sides before carrying them home, I'm not sure. They are bolted on so I can remove them if that's not what they are. I will try to edit the pic down to fit here, I will post it when I get it done. But there are pictures here https://www.facebook.com/Leep3200/photos/pcb.320713971750121/320713618416823/?type=3&theater if you have facebook.
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sparetire01.jpg (67.93 KB, 188 downloads)

Last edited by LeeP; 12/27/2017 8:36 PM. Reason: picture
1961 ford f500
1953 3100 five window (https://www.facebook.com/1953-Chevrolet-5-window-1533405913413610/)
1955-2 3200 big window (https://www.facebook.com/Leep3200/)
55yrs as a mechanic and retired. (kind of)