I had a '71 Nova and the shoulder belt was totally separate and it didn't retract - it was stowed up along the edge of the headliner in little clips and to put it on you had to remove it from the clips, buckle it across your torso and then (I think) cinch up the slack using the buckle. And then store it properly in the clips once you take it off. What a pain! I tend to think about 99% of them went pretty much unused.I had a couple of early 80s Ford Festiva that had the separate auto shoulder belts. I called them stranglers if you were caught unawares.