Sounds like upper strut bushings. If you get the wheels off the gound (and I don't mean at 90mph

) You'll probably notice up/down play with the wheel in question (possibly both to some degree).
The later Mk3 8v's come w/ the better VR bushes, but unless you plan on doing the struts too then it's probably more worth it to just replace it w/ stock. Not too tough, and even with a new wheel alignment shouldn't run you too much.
Oh, and get the Haynes (and/or the Bently) anyway.