I think you may have to adjust the steering stops to stop the tyre rubbing on the strut on full lock cos i think the disco allot brings the inner edge of the tyre inboard a bit. I have these wheels (boost i think) and me inner edges rub at full lock *(not for long though, MOT due next month!!)
I got the most modern 90 you can get (it's virtually the last one off the production line!) and they go OK on it without (as far as i know) any mod (other than changing the stops!)
They came of a 1997 disco,i have all five bit of corrosion on them,one with brand new tyre two half worn two just legal.
looking for a £100,have all the wheel nuts as well.