Spring packs are relatively easy to disassemble. Not familiar with the YJ as such, but most will come apart by taking off the clamps and a center bolt. As far as those rubber bushings, they can be a real bear to get out, I have had success with burning them, getting them soft, and then pushing them out.
Brad (from the 4 Wheeling center of the universe, 4 corners USA)
Brad (from the 4 Wheeling center of the universe, 4 corners USA)