[Tx Firefighter]

In your first post of this thread you mentioned a dually bed down the road. Your truck is a cab and chassis truck so it's way too narrow in the butt for a dually bed. Notice how the rear dual wheels are not any wider than the front ? That's a cab and chassis. Your truck never came with a bed from the factory. It came with straight, bare frame rails and was upfitted to the flatbed by someone after purchase. Same thing as the utility companies buy so they can put those service beds on.

I've got a truck like that too so I've learned what to look for.