If its a '96 then it will have the provisions for hydro clutch already on the pedalbox.
Whether yr going to run the 02A or 02J you are going to need the hydro clutch set-up =
Brake fluid reservoir if yours hasn't got a small, capped stem coming from the lower right of it
Pipe to slave cylinder
Slave cylinder (Goes through the bulkhead and attatches to the clutch pedal)
Pipe from Slave to Master cylinder
Master cylinder that attatches to the gearbox
Or, the Seat Cable to hydro clutch set-up
This replaces the Master cylinder on the gearbox with a bracket which works the clutch from a standard clutch cable.
Both set ups will need this -
Cable change shifter mechanism
If you want to keep the 02J you need to know a good fabricator to sort you a mounting point out in the mk3 shell and thats job done.
If you go 02A, you will need the gearbox (Obviously

) flywheel and new clutch
Its all about preference really, if you do happen to know a fabricator then 02J will defo be the cheapest route..... but not by much
I personally would go 02A, and use the original mounting points designed for the mk3
