You can use the N/A stuff but I wouldnt recomend it ...

A complete T2 Drivetrain swap would be a better choice . That includes Motor/tranny/ECU/AFM/BoostSensor/Harness/Walbro 255 fuel pump / Driveshaft , Rear subframe ....

You would be better off getting a compete Turbo 2 car or finding a wrecked Turbo II to swap everythign from .

Also try to remember . Its alot easier to keep within your year range .. 86-88 AKA S4 and 89-91 aka S5