I found this article in a 1989 Winning magazine. It was interesting how much more specialized tandems have become over the last 20 years.
Co-Motion Winner, 531 & True Temper tubing
Superbe Pro Derailleurs
Dia-Comp NGC Cantilevers
Campy Super Record Levers
Mavic GP-4 36 hole Rims
Campagnolo Record low flange Hubs
Clement Paris-Roubaix Silk Tires