I would not use that for anything other than a ultra light TC, and then only long enough to replace it. I have used them in the past, and have a set in my shop. Todays truck sheet metal is too light, and easily damaged. Strong side winds could get you in trouble.
I think the short bed and your tires and wheels will be your limiting factors. I doubt you would be very happy with the center of gravity behind the rear axle.
Personally, I do not agree with the "gotta have a 3500" truck. You need only to do a search on the Forum, and you will see many others have the same belief as I on the necessity of the 3500. It is my preference to install 19.5 tires and wheels, anti-sway bar, and airbags.
I have had my present 1996 Dodge 2500 truck 2WD and 11.5' Bigfoot TC for over ten years and 150,000 miles (with the TC). The truck weight is 6200 pounds, and the TC is 4200. My TC adds about 4000 pounds to the rear axle, and 200 pounds to the front axle. It has, and does, serve me well. I now have over 250,000 miles on the truck. I have no interest or need for a 3500 truck, certainly not a duelly.
This post is simply to state what has worked for me. I encourage others to do what works for them based on their beliefs, driving skills, and comfort level.