hmmm... I recently greased the bushings on the rear sway bay in my Mystique and they were bolted, not welded. One end of the u-shaped clamp has a little bent part which tucks onto a hole, the other end of the clamp secures with 1 bolt.
Speaking of rear sway bars... does anyone know if the early '95 Mystiques have an 19mm bar (I have no caliper to measure)? I had heard that they do and later models have a smaller diameter bar.