Its all easy mate, just the normal rb30 4wd stuff
You will need a sump adapter. You will need to sort out the oil pickup. The lower gearbox to sump bolts will not line up by the width of the adapter. The head will be 30mm higher, affects to radiator hose, intake and exhaust.
But that's about all. Plenty of clearance for the motor including keeping the factory strut brace.
Oh, and it is an awesome conversion