No vfaq level detail on those sites, I see.
There was one page that had a little bit of info on what would be needed in a z31 turbo swap, just a vague listing of parts that I wouldn't trust as complete.
From the looks of it, essentially what it would involve is finding a wrecked turbo donor car and if not going for the total engine swap, at least yanking a ton of other stuff to swap out for the corresponding NA parts.
largo- I'm telling you, just wait for the turbo. Then the first work you do on the car can be the fun stuff, mods.