Hello, The side mount was used in 53,54 and 55 1st. It is correct only on those years but can be use on any post war GM truck to 55. The 54 carrier is differant from the 53 the 2 vertical supports are changed to fit the new bed design and a tie in bracket is added to the top left of the front bed panel.The most common carrier was for a 6.00 x 16 tire,next is the 6.50x16 carrier then the 8 lug for the larger trucks. The 1/2 tons need the rear fender with the indent. 3/4 and up did not.A 6.50 tire on a 6.00 carrier will rub on the fender. I have never seen a original mount on the right side. Runningboards do not need any modifications.
When buying a used kit besure to get the under bed support (the bottom holes in the vertical attach to it and it is also mounted to the bottom of the bed.) This part is often missing. If you are buying a kit for a 54 besure the front bed panel tie in bracket is not missing. It only can with the side mount spare option.
When I add the indent in a fender I flip the cut out 180 and weld it back in.
If have any questions on any thing I might have missed please email me at my new email address
[email protected] Thanks Ray