I've never seen a utility bed like that, my guess is cab and chassis' went to another shop to have them installed. It sure looks like a shortbox, the only thing that would make me nervous is airports ordered short wheelbases for tugs BUT this doesn't look that short.

I would buy it, just by looks it seems to be the right proportions. You could always move the leaf mounting spots if an inch or 2 is needed, or build a 3/4 link.