Originally Posted by Jordo!

Even if it could, the fabwork to make everything else mate up would be an enormous undertaking.

Then there's getting the ECU to work -- would have to be something like Motech full stand alone, drive train, etc etc.

It would be cheaper and easier to buy a salvage title GT-R and modify the body to look however you wish, perhaps custom retrofitting Z bumpers and the like, if the aim is a GT-R powered AWD Z.

There's virtually no shared parts between the platforms -- bear in mind that even the G and Z have some differences where everything doesn't simply bolt right into place (e.g., exhaust components) and those are practically identical vehicles built off the same exact platform.