GMDad
I had a 69 C10 that I hauled a cab over camper 7 1/2 ft wide and towed a 24 Ft boat that topped 3000 Lb behind it all over Ohio, Michigan, and southern Canada with no problems. It had stock radiator no AC. Also standard shift with 4.11 Gears. Got around 8 or 10 mpg if I remember right. I don't think you would want to take it into the Rocky mountains but in our part of the world you should be ok. I pull my roadster behind my 41 plymouth on an open trailer with 3.50 gears and a 700R4, in this part of the country it does fine but when I had it in the mountains it strained on the long hills. I would probably go to at least a 3.90 gear if I was going back to the mountains with it.
