Yes the Hardbody 1 Ton did exist with a full box, but they were rare. Most of the time they were sold just like NM50 said..."Cab and Frame". Many of them had flat decks or small cubes installed. Others had campers grafted on them just like the same era Toyota Pickups did.
The scale model company called Lindberg actually made a kit of the 1 tonne Hardbody complete with box, dually wheels, roll cage and fire extinguisher in the kit.
This link will take you the e-Bay sale so I have no idea how long you will able to view it.
http://cgi.ebay.com/LINDBERG-4...sting