You might have a problem with the orientation but it will work.
Here's a list of engines seen in a z31, http://www.az-zbum.com/modification.engine.swap.shtml
I had an 84 turbo that I had up to 145.
try ebay, search 1985 300zx for the Nissan Service Manual, I have the 1986 manual , it contains the wiring diagram
on the internet it says the N/A has 160 and the turbo has 200
A 1985 Nissan 300ZX has a 3.0L SOHC V6 engine ... therefore, 6 cylinders.
It is the control box under the dash
it's called VG30 3.0liter V6
1989 supra turbo 5 speed is = to 1985 300zx turbo 5 speed?
The Nissan Service Manual has a wiring diagram, look on e bay they can be bought there.
Remove the belt from your 1985 Nissan 300 alternator. Remove the wiring harness from the alternator. Remove the alternator retaining bolts. The alternator will come off.
Put the transmission in neutral or push the clutch in and then stop the car. When stopped, turn the ignition off.
this site might help----->