I'm building this one back up. I rebuilt the headset yesterday, which is the first I have ever done. I was a bit hesitant as it always sounded difficult, but it went pretty well. It took a few tries, but the steering feels really smooth now. I also discovered a neat tag in the head tube. Many of the components had a "ST" stamp on them - crank arm, crank rings, rear derailleur, hubs, rack and others I am probably forgetting. When I looked down the head tube, I saw a label with the name "Scott Thomas." I assume he was the originally buyer and stamped all the components with his initials. It's pretty neat to know that most of these components have likely been together for nearly 40 years. Maybe the front derailleur was replaced at some point as it does not have the "ST" stamp.