There was a short `70's Dodge van that someone did that too. They cut the back and brought it up so it was directly behind the front seats. The rest was a bed. They did a pretty good job. It even had the swinging tailgate like the newer Chevy Astros.
There is also a stretched Dodge 1-ton. I has four bench seats and then a stretched bed. I bet that thing is close to 40 feet long.
