Well I know if you wanna put a pas rack into a mk2 golf you can use a Mk3 Golf, Corrado or Passat one so I'm pretty sure it works the other way lol! If your 'rado is a 16v you should be able to use the tie rods that are on it, might as well change the rod ends while it's off though.
Yea mine was a non pas but when I change the engine I put the pas rack in. Personally I feel it's a lot better, a lot nicer to drive and the steering has still got a good amount of feeling to it. But it's personal preferance lol!
Also remember that because you won't be using the pas pump you'll have to get a new fan belt. Also you will need the non-pas uv joint.