What you need to do:
Get the donor AW4, TCU, TPS, and shifter (and any other associated parts I didn't think of offhand.) While you're at it, simplify things by grabbing the mated tcase, if it's still there - as well as the driveshafts. And the wiring for the TCU.
Remove all the manual transmission parts (and the TPS on the throttle body - the AT version is a "doubled" sensor, while the MT uses a "single" sensor.)
Install AT parts and electronics, along with tcase and driveshafts.
Crate up the clutch pedal goodies and send them to me( :laugh3: )! I've got a conversion in the works for my 87...
I know that's hideously oversimplified, but I wanted to point out that you can save work by "shotgunning" your parts expidition, and that there is that oddball electronic issue to handle with the TPS.
I'd probably have use for any small removed parts, the clutch linkage, and I doubt that Tcase might make its way out here, but you never know... We can talk deal via PM or email...
5-90