Make note of the order of the bushings, washers and cups as you remove them.
Shown here is the order, from bottom on the right to top on the left. On the bottom the mount on the cross member goes between each rubber bushing. On the top, the bracket goes between the rubber bushings.
Consider replacing the rubber bushings while you are replacing the shock. With age they soften and compress becoming less effective. New bushings are shown in this picture.