Heat and vibration tends to loosen the manifold to turbo nuts unless you use conical nuts or some sort of thread lock or tighten them when really ficken hot
Actually i lock all of my graphic design files so they cant be reworked by others at the clients request and i own their art and mAke them pay for me to unlock it
Your keeping the awd?
Then really you would want the gtr suspension as well.
That is a massive job, have a look at the build thread for the A9X torana on here, he is doing the full motor and drivetrain into it and basically transplanting the entire floor from the gtr with all fabbed up suspension mounts to use all gtr parts. He is a fabricator who has worked with custom cars for a long while.
Rb26 in rwd only into your ute would be a much easier task.
Start by measuring the engine bay, trans tunnel etc to see if it will fit or how much more room you need.
Oh and then consider how much of the work you can honestly do yourself, can you do a decent weld? How are you are wiring? And start putting a budget together, new driveshaft perhaps, tub the rear cause your going to need some more rubber at the rear.
Big undertaking
Take off the whole cowling, plastic piece infront of windscreen under wiper arms, clean off silicon remove old dry rubber piece and respray plastic with proper plastic paint, looks thousand times better just likenew again
And hopefully you still have vct so really you can only change one timing gear the other will need a special one for keeping vct, readup im sure there is something out there possibly but probably not worth the hassle...
How std is the car?
Ive been running alloy pulleys and had no probs...