I like how the top of the bed is lower than the top of the doorline. it adds dimension. I also like how the bottom of the bed is higher than the bottom of the door just a bit and the addition of the step brings the whole thing together. It keeps things lower(COG and body lines). I'm thinking a piece of pipe running the length of the bed at the first roll from the bottom on the door with a diameter to match the radius of the roll in the door. from the top of the pipe, a piece of broken sheet metal channel formed like an upsidedown G running parallel to the runner pipe, and set just inside of the outer plane. then some sheet tacked to the outer 90*point of the pipe and brought down to the bottom rail(with wheel arch offset incorporated and support gussets to give the sheet the same bow as is in the lower section of the door. a step below the bottom of the box ahead of the wheel arch, and some tie down hooks on the top of the G rail. The idea would be to create a separate bed with the same body curve and the same width, and to have it all finish flush to the top of the door handle, just like the 7X series boxes. I would not integrate a headache rack into the bed frame, but build the bed to accommodate a bolt on utility rack. I know, I know....PICS.