The aluminum-frame Stowe 2-in-1 unit is not only protection for whatever is in the truck bed, but the separate "toolbox" can store up to 400 pounds of stuff. Plus, the two compartments are secure ...

Ram does something like this with its patented RamBox, though those compartments are ... it just looks like a stock truck.

The truck is listed by auction ... The C10's wood bed was raised by the builders to allow for the fitting of a couple of concealed locking compartments, and further down there are the pipes ...