I tow with my setup, superhitch, supertruss (42") and my trailer is about 4k and moving to an enclosed this spring adding 1-2k of weight). I'm comfortable with this setup and would take it anywhere.
Having came from a '95 F350 with a tuned powerstroke (aka, powerstruggle) I would HATE to try it with a low powered 460...and not to mention the junk brakes on that gen Ford.
Can it be done? Sure...hope no hills or the flow of traffic is in your future.
I'd consider some of the lighter and shorter pop up's if your stuck with the truck. Also realize you might (will) also have to spend a few grand outfitting the truck with the mounts, hitch, tie downs, tires and suspenion aids. It adds up, budget for it.