You cannot use a 2wd tranny, the output shaft is different and the mounting holes for the transfer case are not there. Any 42rh or 46rh from a '92-'95 will work. Post '95 transmissions were listed as the 42re and 46re, meaning they were electronically controlled, not hydraulic and you're computer will not control them. If you can find a 46rh, they were designed to handle the 5.2 and 5.9 V8, and are "beefier" than the 42rh.
Just out of curiosity, where do you live? I'm selling a 46rh out of my '95.