My very first TC was on a 70 Ranchero, it came with it. Talk about ma & pa Kettle.....hahahaha. I used the **** out of it, it had an 2 or 3 cu' icebox, 6 gallon pump handle sink that drained out the back, a closet, a couple of drawers, dinette bed at the front, and an east/west full bed in the C/O.
I was probably WAY OVER the rear 9" axle and the GVW, but it didn't seem to mind it back there, and was used for 5+ years till I got my 86 dually and an 11' Travel-Eze TC. Then it became the "fort" for the kids.