A few things I've seen done here....RB26DETT have been put in a few cars 240ZX, GTS-Ts, CEFIROs..and a few others. Or check out....... This guy Mat who works at Motorworx. Go to (
http://www.motorworx.tv/) They give a little break down on engine rebuilds blah blah. Basically if you want you can get a gts-t from Mortorex(different) for about 18grand and throw the RB26DETT into it. The mounts shouldnt be a problem just need the ECU/ harness stuff. And I almost wanna say you can fit it to a RB25DET Tranny. Dont quote me its just what I've heard. Of course I can get you some more names of some guys who stuck with a VG30DETT and are doing just fine. 300ZXs Are too heavy for me.