Have you considered putting in a VG30DETT? They make good power, you'll find parts for it with out any issues (like at autozone etc.) If your in CA it will pass smog legally (assuming you want to DD the car) and, from what Ive seen, it will probably be easier to work on in a s13/s14 engine bay compared to a Z32.
Or you could buy a truck, wreck into a R35 and take the engine and have a VR38 powered 240sx
