If you have a MK3 turbo, it should have a factory LSD. They will wear out, but you can get aftermarket units from Kaaz, Cusco, and ATS. To make it drift well, you really only need coilovers. 18kg/mm front and 10-12kg/mm rear spring rates are what I'd prefer, but the ride quality won't be GT-like anymore. I also recommend a racing seat as it keeps you firmly planted for better control when you'd normally be leaning against the door panel or center console...
The MK3 is one of the more difficult cars to drift, but it is rewarding when you get it down. Plus you can hop in a 240 or a corolla and within minutes be able to drift it as well as its owner... The major downside is that it does not have the steering angle of most cars, so this is about as extreme an angle as you will get:
