OK I have a 63 Fairlane. It was upgraded to a V8 and now I have a 9" to replace the old weak "stocker". The problem is I need to weld on new spring pads to the 9" and need to know how to center it properly. I have some good ideas but would like to hear what has worked in the past? FYI, I did write down the measurments of the old "Stocker" but they got wiped off the white board.