Factory bushings have an outer steel sleeve then bonded rubber bushing and a steel inner tube of steel sometimes the bolts rust to the inner sleeve and then you saw zall the bolts out cutting through the side of the bushing while trying not to cut the spring perch. next you try to drive out the bushing and if successful it will still leave the thin outer shell in the spring you can try to cut the sleeve with a saw zall where the spring rolls back on itself or as I do use an air hammer with the pointed punch bit and force it between the shell and the spring then change and use the panel cutter bit with the hook on it and use the hook part to grab the bent shell and drive it out. if you have struggles with the rubber in the shell go around the rubber drilling holes in it around the perimeter until you can separate the rubber and the outer shell before you attack the outer shell. just depends what tools you have to work with.
