82-300td (a member here) attempted this about a year ago. He was unsuccessful because he never could get the spud nut removed from the output flange on the SD's auto tranny.

It apparently doesn't use the same 30mm nut as was used on the output flange of the flavor of 722 (cable drive speedo out of an '85 300TD) that I donated to him.

You might ping 82-300td and see whatever became of that project.

__________________
Never a dull moment at Berry Hill Farm.