Very nice fix. I installed a new collar, bushings, detent, shifter, insulator and new roll pin. That only corrected the shifter from rotating 360 degrees and made the back-up lights easier to contact. The shifter still has a one spot play meaning the culprit lies at the bottom of the shift tube in the selector arm. I might ask a welder if he can do anything with that.
How do you widen the diameter of the roll pin? Mine likes to slide out by itself.