This template was sent to me by Guldstrand Engineering for my 69 Camaro, but it can work on any GM suspension from that era.Basically what you are doing is raising the roll center about 3".The control arm mounting holes on the frame are redrilled 3/4" lower and 3/16" further back.On the 67-69 Camaro you will need to also grind down the top of the ears above the old holes so the control arm doesn't rub on them. On other cars make sure you check to make sure there is enough mounting bracket to do this modification.