what year is your ute? if its after about 75-76 it will already have the correct control arms and castor rods, then you will just need the stanza balljoints and steering arms, possibly longer tierods and the location spacer for the steering arm.
Will need coilovers as the standard r31 springs are too large, but you already have that planned.
Then you need to sort out brakes, which may require a slightly larger master cylinder
you can also run large external gates in conjunction with turbos that have small rear housings to get boost to come on quickly then divert the exhaust flow out the wastegate so that the small rear housing doesnt choke the overall exhaust flow