from my understanding , you give them the pressure plate/ flywheel bolted up as it will bolt up to the car , you don't give them the clutch disk because since it always spins when disengaged it doesnt matter ...
i have a fidanza flywheel and stg5 clutch for my z31 , i was just going to toss it in ,but from stuff i have been reading lately ,i now plan spending the extra cash and get it balanced