Not exactly what you're asking, but I run an older version of this electronic shifter on a Cherokee AW4:
http://radesignsproducts.com/Rail.html
It lets me flip an Auto/Manual control switch that I wired in and then I use this shifter for full manual control of the transmission's forward gears (you still need to use the tranny shifter for reverse). Flip the switch back and it's fully automatic again, controlled by the tranny shifter. You can wire it in so it's always in control of the tranny, but I didn't want that.
Best of both worlds and finding this was what finally made the decision for me to go with the 4.0/AW4 along with the advantages of EFI, overdrive and the ability to drop in a stroker later.