Thanks to everyone! I was confused by some previous posts where the poster bought the FR-7 and it was still too large. Apparently, there must have been an older Falcon hub that had a smaller diameter. I was also hampered by my difficulty in getting a measurement I trusted from trying to measure inside the freewheel itself. According to the Park site, a bike shop near me does have the FR-7 in stock I will be able to take the wheel there Tuesday morning and verify fit before purchase. I also have a Shimano equipped wheel from a 1990 Schwinn 5 speed that I suspect will take the FR-1.3 tool which I also will take to get a match.