When I put in the 9" I had to make new plates for the lower since the 9" already had different style mounting gussets on it. I also thought that I could make new upper mounts and change the angles of the shocks to provide more stability and better ride. I did get better handling out of it but it was still pretty soft. Now I want to go back to the stock shock locations but I must have thrown away or left my old plates at my parents house (which is 625 miles south of me) and I cannot just pop in to search for them... I did find a set from a 64-66 Mustang that are going to work great.