Find yourself a V10 TDI Touareg and then you'll get 7700lbs towing capacity + air suspension - a better choice for this kind of load.
So you can drop the engine and rebuild the entire thing while you're in there replacing the alternator? I'd argue too short of a wheelbase as well. I probably wouldn't get a newer diesel Super Duty, I'd save the money and get a gasser with the big V8.