first drive in my (new to me) 72 Duster

Exactly! I figured that there would be some issues and I was right....I just didn't know what those issues were! The car will go into a shop on Monday. These guys know this stuff a lot better than I do.
Your car is knocking on the door of being 50 years old now, so lots has happened to it over the decades. Glad it has a nice, new home with someone who cares and appreciates it!