Power steering for my 90

Just bought my first Landy, an ex-military 2.5na 90. Really happy with my purchase, mainly because it seems very solid...
Only thing that almost stopped me was lack of power steering! It seems very heavy, not helped by smaller diameter steering wheel, which I'll replace asap! I'm considering converting to power steering, but wonder what's involved e.g. what parts are required? Is it a straight forward job?

yep pretty straight forwards. you'll need steering box & pump. & reservoir, later 90's had PAS as std so you can cannibalise the gubbins from a scrapper.

Excellent! Just made me very happy, I'll start searching... Can I only use pre 200tdi parts????