No matter what you do, as I understand it, is make that 1500 pull that trailer. That was the question. Lots of suggestions, to modify the truck, lots of good suggestions, I personally would not do any of these mods. It still may not be safe, and it will sure be illegal.
Not my kind of drive, wondering what happens with a hill, cross wind, sudden braking or a swerve maneuver, but each to his own.
The other day I had a bear run across the road, we were so close to hitting it, the bear "voided" ( pissed to be crude ) himself while sprinting across the road. I jammed on the brakes and swerved, at 65 mph, my 1995 Dodge handled it with no problem. You never know when you have to do a sudden lane change or maneuver..
Be safe.. ask someone to tow it, pay them, rent a truck to do it with the money you are going to spend, trade the truck for another one, there are options.