My Guess is Design By Photoshop

Found the name, its called a Holiday Rambler MotoVan. Wagonqueen did buy it, the picture by the side of a building is the one she purchased for restoration.

Here's a pamphlet on how the rear suspension and what not worked.



They were welded aluminum framed units, with an air suspension on the rear axle axle, each axle of which was independent with what I can best determine as having solid core insulation in the walls.