Short answer, yes UAS told me the gearbox from NA and tt are the same (at least in the manual) the only difference is the clutch (was looking awhile ago when mine went)
Does the bellhousing line up? I'm not sure but if yes then you should be able to fit larger diameter tt box up to an na without having to change flywheel yeah?
Yeah bolt pattern and shaft size are identical. Some NA boxes required a bit of meat to be removed to clear the TT fly.
advertised on nissansilvia.com or similar??? maybe boostcruising lol im sure someone wants this even if its not for a zed