Welcome Robert. I live a ways south of you in the valley. I have a 89 that needs to be converted as well. I have been gathering the needed parts. Pretty close to having it all real soon. Mine is a 5 speed though.
I have a couple of AW-4 autos as spares for my Renix XJ. I also have a few transfercases. All f them will require rebuilds though. I am not offering my spare for sale, just pointing out that the required parts are out there, you just need to search.
Good luck and when you get a few minutes you should post up some pics of this pristine bodied MJ.
Blue