Keep your eye on ebay, a got a real bargain. Monster for a trolley jack, 5 foot long body 5 foot long handle cant remember how high it lifts but it will pick up a house. Cost me a tenner B) it will do to pick up our disco/90 to plonk it on stands then ok to work underneath.
Did you put new bushes on the top shock mount ? get hold of the shock near the top and see if it has any sideways play in it.
When i changed the rear axle on my 90 to a disco one i put everything back as it was on the shocks but something was rattling. I had to put a extra washer on the inside of the top bush so the shock sat tight on the bushes.