Check out hybridz.org. A few guys on there have done it. Here's one example: http://forums.hybridz.org/showthread.php?t=123023&highlight=rb26+z32 Mating the RB26 to the Z32 trans: http://forums.hybridz.org/showthread.php?t=141588&highlight=rb26+z32 General RB in Z thread: http://forums.hybridz.org/showthread.php?t=77962&highlight=rb26+z32 This actually uses an example of putting in an RB26, probably what you're looking for.
They fit pretty neat, custom sump and radiator required. IMO not worth the $$ over a TT unless you love the sound and want to be different This is Zturbo's, it was done at a shop here in Brissy. Very neat and tidy swap. Also has a pair of HKS SS's I believe.