91 auto AWD/ converting with JDM '90 GVR4 M/T

[SpoOLxExO]

I just have a few questions that need to be answered by people with EXPERIENCE on the topic. I dont need arrogant replys, or "Don't knows".
This is also for my buddies project as he has no internet. It is a 91 AWD
and he already has purchased a 90' GVR4 Trans/Xfer case, so can't get a "91" trans/xfer case.
Now with that out of the way, here are my concerns:

-90 trans means you need a 90 shifter assembly/ cables, correct?

-90 trans with 90 transfer case, will it line up with the driveshaft and front axles?

-Doin a 4 bolt swap also. will the stock driveshaft fit the 4 bolt as well?

-Any cluth/Brake assembly from any M/T 1st gen will work, correct?

I'm sure I can come up with more stuff, but for now thats it.

 

[SpoOLxExO]

The ECU, what considerations need to be made with the ECU when its been converted to stick? Any wiring issues, etc?
Thank you for your help

 

[Tom Sawyer]

I know that the final drive on the GVR4 and the 1g is not the same and that it will eat up your differential/Xfer case.

Tom

 

[SpoOLxExO]

I have the Gvr4 Trans, the GVr4 Transfer case, and a four bolt rear end.
All I need to know is will the axles and drive shaft fit?
oh and the ECU info would prolly help too.