Buschi from what I know, there is only 1 type of manual box, and its the same from 64-76 i believe, only the pitman arms change. I recently swapped mine and used one from a 65 Dart, just used my pitman arm. Hey Buschi i also wanted to thank you and your site, it kinda helped me out when I was repairing the coupler as it was my first time! http://www.buschis-place.de/steeringcouplerrepair.htm