I plan to use the "water pipe" from the VG30, so I can reuse the heater core hoses that fit it (the VG33/Xterra use larger diameter tubes and hoses). I also plan to use the Thermostat Housing from the VG33, so there won't be any hose/interference problems on the front end!
Two bolts attach the thermostat housing to the block, one bolt attaches the pipe to the rear of the block, and this heater hose needs to be disconnected.
Removed, next step will be to clean that coolant passage surface.
Tube mating surfaces cleaned...
...tube mated...
...tube installed!