Hello John. I owned a coppertone International back in the 70s. I think a Campag NR Triple set-up would be quite approriate for your bike. If you can match it with a first generation Campag Rally, it would most cool. If your International is original and in good condition, I think the money would be well spent. If the bike has been pieced together, anything will do. All the Internationals that I have seen have been set-up with double chainrings from the factory. Best Wishes,
Dave Martinez
Fremont Ca