hi I have an 85 f350 with they rear sway bar. it is a dually. the bushings are attatched to the shock mount, which is all held on by a U- bolt, not welded to the axle housing. it is basically destroyed, so i welded the pieces of the shock mount together, bought some heavier u-bolts, but no one has the right bushing, the one they think fits is totally wrong , any help?