200TDI Pas Pump, 4 or 6 bolt.

OK, i know this question could be solved easily by going and looking at the defender, but its 8 miles away and i forgot to check yesterday and i need to order parts tonight.

Its a genuine 200tdi 90, i need to replace drop arm ball joint, as was going to just buy a whole new drop arm with ball joint and put it on, but theres two options, 4 bolt or 6 bolt.

Is there a way of telling from age or chassis number? Its a 1992 and i have chassis number here.


thanks
mat

mines a 1990 and i had the old 6 bolt in but ive replaced it with a 4 bolt from a disco and it fits straight in, i hope that helps
regards

My 1990 90 is also a six bolt (2.5 n/a)