The only resource I have/know about for the side mount carrier installation is in the 1947-54 Factory Assembly Manuals (FAM). I have a reproduction which I refer to regularly.
I snapped a pic and attached it below to try and answer your question on the side mount install info.
Please make note that this picture/diagram shows the unit being mounted to a 1954-55.1 bed side panel, which is different from the 1953 and earlier beds (flat top rail VS angled top rail). Positioning of the mount to your '53 bed should be doable, with some adjustment for the differences in top rail angles.
Do you have an actual '53 side mount to install??? If you do, please post some pictures of the mount, as well as the installation process you use/finished project as I am sure many would appreciate seeing it.
Dan
PS - The FAM is probably the main source for all the various accessory installation instructions and diagrams. They are readily available from various vendors at fairly reasonable costs.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
