The '91 uses the top three bushings on the right of the image. There are some rubber washers between the bushings and the arms. They will probably be old and brittle, or you may tear them up removing the old bushings. My parts store didn't have those, but I found some almost the same size at the hardware store. They measure about 1/2" wide x 1/16" thick, with a 3/8" diameter hole. The ones I used were a little larger on the outside diameter, about 3/4", but I don't think that's an issue.