Just re-read your original post on this again & now I REALLY want to see pics. These 70's bodies are a long way from "bolting" onto a 90's frame from what I've seen, so I'd love to see how the truck you saw above was done. Hopefully you snapped some pics of the body mounts.
I definitely want a 4 door (crew or 4 door bronco) on a TTB setup one day. I wish it was as easy as bolting on!