The reason I ask is because my current bed is falling apart at the seams.
No joke, the sides flop as I go down the road. I often haul large items and it would be nice to have a flat bed.
I would put removable sides on it and make a removable aero cap. I can put tool boxes under the sides to make it more slick in the wind, and I would have places to put my chains, straps, cables, jack, etc...
It would also give me natural counterweight for plowing. I have been putting the chains on for the deeper/heavier snow because of highway tires and no weight on the rear axle.