Here is an update. My father in law, retired machinist, removed the outer sprockets of the gear cluster by grinding them off. The inner sprockets then pretty much fell off. The race in side, the one with all of the little ball bearings came off but I was not there to see it. At that point all that was left on the threaded hub was one hard piece of metal. In order to get a grip on it, Harry, my father in law, squared off two sides so he could very firmly grip what was left of my freewheel and after quite a bit of grunting in a counterclockwise direction, the destroyed piece began to move on the thread. I missed watching that action. So my 1986 Campagnolo freewheel was sacrificed so I could save the hub, spokes and rim. I have now replaced my broken spoke and I have been shopping for a new freewheel and chain. I can appreciate that the free hub design is the standard and the freewheel is much less popular. I can easily order a 7 speed Shimano hyperglide or a 7 speed SunRace freewheel. I have dealt with the supplier of the SunRace before so I will probably go with that and see how it performs. As I browsed the web site for Mountain Equipment Co op I found 3 potential freewheels but about 20 Cassette style sprocket sets and a better range of prices. Oddly the site does not have bearings. When I got my wheel back from Harry the saved bearings were in a small glass jar. I counted 17 so I think that between 1 and 3 must have rolled away and been eaten by their cat in the process. Within two weeks I should have it all back together then will post a picture. Thank you to everyone who offered a suggestion. If I had known all of that before I attempted to fix it myself I would probably still be using my old freewheel.