The holes in the truck bed walls of a pickup are called "stake pockets" and are used to attach items like straps, truck racks, or other accessories to the bed of the truck by hooking them into the holes; essentially acting as tie-down points.
Also extending the height with boards to haul more...
With no dealership and 80% diy being advertised. I'm hoping for a trap door above the fuel pump. One small electric fuel pump which fails at 200k miles usually forces a mechanic trip. Dropping the tank is cumbersome and the tank strap bolt tends to rust overtime.
A trap door above the tank...