Now that is neat. I recall reading in a farm paper about an older fellow who was pulling a TT with an ordinary pickup. He figured he should have a bit more power for pulling up steep hills.
He took a smaller front wheel car, cut away everything behind the engine compartment, added a hitch front and back, and placed it in between the truck and the TT. When he needed more power, he remotely fired up the car engine, put it in gear and poured the coal to it.
It was quite the contraption, to say the least. It behaved much like a helper at the head end of a train.
2012 Jay Feather 197 w/pull-out
1997 GMC Sub 1500 4x4;
or 2015 Ford F150 4x4 SuperCrew EB