A904 transmission for 318

And the PT KD mechanism can be retrofit down to 67 IIRC, AND
the slanty trans may have the required parts.

However, I gotta tell ya that the stock A904 from a 71 Demon is likely the all-time best shifting transmissions I was ever lucky enough to drive. Almost Immediately, I pulled that trans out and built 3 or 4 clones, kept the 71, and installed one of the clones. That was 1976.
I still have at least one clone and the original Demon trans.
Thanks for the information, I will keep an eye out. I am trying to restore the car I drove in highschool. The 70 Dart Swinger with a 318 was my first car back in 2003. The only modifications I made were a high-rise intake and a 4-barrel carb. The 318 that is with it now has both of those, and a heavy-duty racing cam that my father gave to me. I am just looking forward to cruising in my old car again . There is nothing quite like your first car.