I finally made some progress on the box last night.
Removed the paint from the sides, and spot blasted some surface rust in the hinge areas, welded up some trim holes, and started smoothing the top of the rails, and fixing some dings. This box is in very nice shape, it had all factory paint, and no previous body work. This evening I plan of finishing up with round 1 of the body work, and getting a couple coats of epoxy primer on it.