[trike lady]

That's a good size camper for that truck and it should have been designed like the one in the pic with a tag axle.
That is a vintage Len-Dar truck camper from the late 60's early 70's.

 

[trike lady]

I looked at the specs for the Eagle Cap Camper and it is largest model and has a lot more in it than the old Len-Dar. The inside of the Len-Dar had a booth dining area, kitchen with storage space and sleeping over the cab plus an all in one bathroom.
Eagle Cap 1200 — Eagle Cap
Another oversized truck camper was the Born Free made in 1972 and because of its size it also had a tag axle.

 

[trike lady]

The one that I have posted with the Len-Dar camper on the white GMC, I can tell you that Tom had a heck of a time getting the camper rear axle setting correct so that it would track right and steering and turning was no fun as the rear axle tended to want to drag in turns. The one that broke the truck in half tends to be larger than the one I had.