Any will work, ideally you'll land a 94 and up to get the internal slave. If you don't, you can convert it to internal by getting a newer bellhousing and tcase input cover.
Pilot pushing may or may not be an issue, first and last one I did, the one from the AX-15 rebuild kit fir the 88 4.2L just fine. YMMV
Tcase shifter bracket needed re-worked, you'll use your old one plus a part off the "new" one. (IIRC)
Transmission mount will need some work, I forget what we did there, but it wasn't complicated or real time consuming. (required drilling, but can't recall if welding was involved) Don't forget, how your exhaust hangs off it will change.
The tcase isn't a big deal, ideally you have one already mated up to it. Worst case you'll need a new input shaft for the tcase and have to tear it clear down to swap it.
We completed the job in what would have been a 10-12hr or so day had I not ran out of time in the evening helping the guy.