mr roboto-Wiley, let's put this in perspective. This is something I moved earlier this week. It's weight is 13,400#
Towed with this. It's weight is 12,500#
The weight you are looking at towing is around 18,000# including trailer. Your total weight with your truck will be more than my 2 ton truck and the mobile home put together.
There's just nothing you can do to your pickup truck to make it handle that kind of weight safely and legally.
Even with the above truck I was only within 100 pounds or less of being legal / illegal. (I removed everything I didn't need on the truck before the move or else I'm sure I would have been over).
I know in OH and MI there's some pretty funny fomrulas on how DOT determines a legal load. There's trucks that operate in those two states that you don't see elsewhere in the US.
In Kali and TX, that would have been an overlength load. You were within the weights but exceeded the length. That combo would have put you into class "A" specs.