This isn’t a guide, or even all that useful. But there’s not a whole heap of information about the Garrett T3 Turbo attached to the 300ZX Z31 VG30ET, so any documentation is good.
Hopefully these pictures help someone.
CHRA 
CHRA Water Lines 
CHRA Other Side 
Cool Nissan Motors Logo 
Wastegate Actuator and Diagphram 
T3 Hot Side Removed 
CHRA bolts 
Coupla T3s and Z31 Dump Pipe.