Most of the guys that buy a rb26 motor set, end up with a awd box that they can use the bell housing off of, so it's just a matter of coming up with a z32 box to mate to.
Or better yet, find a z31T (88-89) and use that with the front bell from the awd. No shifter dramas that way...
rb25 guys usually get the correct rb25det box with their motor set, so they are good to go.
I know this is old, repeated info I just posted. I just wanted to put it all in one place again for those searching.
j.