Strenght, standard driveshafts, lsd.
50's series box for mounts, keeping stock clutch setup (hydraulic) You will need to find a slave cylinder that will work, gtir might, not sure mine was attached to the bellhousing i got from NZ.
Using a U12 awd flywheel, with a bit of machining the inside of the bellhousing you can use a skyline clutch kit. I did this not long before I started using the work ute, and massive difference. Well worth it. You will also need an awd starter motor.