I realize that I am close to pushing the limit but I am on the lookout for a 3500 dodge dually, I prefer a 12v 4wd flatbed but they are hard to find and go very fast when you can find one. I think that if you take off 10-15% for hitch weight that I am still legal for now, hopefully I can find one soon it would make me rest easier towing for sure.
John
The dodges with the old 12 valves are good trucks but hard to find in decent shape for sure. Another option would be to go gooseneck. As I stated your truck is rated for roughly 14k on a gooseneck. For me anyway Ill never go back to a bumper pull trailer for anything bigger than a small boat. There is just no comparison to how much better they pull.
I haul a TN75D with my 01 f-350 SRW that is ballasted to about 9k on my gooseneck. Total weight is right at 13600 and it pulls it like a champ. I go even heavier hauling hay home and it still feels safe and pulls it well. Just something to think about. You have plenty of truck your limiting factor is just the type of trailer you have.