My father built this Class C in the 1970's from a 1973 Ford van and a Montana Bell camper. It was a special model with a sliding fiberglass and plexiglas domed cover on the bunk. Unlike most other campers and RVs of the era you could sit up in the bunk without hitting your head. Even cooler was laying down up there when it was raining.
The engine was a 302ci V8 with flat top pistons and small chamber heads from 1968 or 1969. It had loads of power and could easily pass semi-trucks going up hills. The back has dual wheels mounted with a Ricka kit.
I'd love to know if it still exists or if not, what happened to it. It's definitely a one of a kind RV, not another one like it ever made - unless someone else merged one of those rare pickup campers with a van.
I have a few more photos, including some under construction shots.