I had a 68 Dart GT convertible with the trailer tow package. That included with the 318 a 727 trans, heavy duty cooling, and 8-3/4 axle. It did have a hitch, and I used it with a tow dolly to pick-up my 69 Formula S 383 fastback in 1986 and tow it home 80 miles...
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
