I even investigated the possibilty of converting the car to auto, I am starting to have some leg problems, but it would seem to be a very difficult project. The people who did it for Morgan only did it for the later GDI engine which had a "fly-by-wire" throttle.
It was probably necessary so the the controller for the auto box could adjust the throttle setting when the gear changes are made.
I believe that Ledgerwood did an Auto conversion for the factory on a pre GDI +4