http://www.libraracing.com/
"For four years starting in 1977, Buffum drove factory Triumph TR-7s and TR-8s, and picked up Doug Shepherd as a co-driver. The pair dominated both the SCCA PRO Rally series and the North America Rally Championship until British Leyland dropped out of racing in the U.S. In 1981, they tried running Audi 80 and Peugeot 504 racers, but could not keep up with Rod Millen's factory Mazda RX-7 rally entries."
They won the '78 Press on Regardless Rally in a TR7.
http://en.wikipedia.org/wiki/Press-on-Regardless_Rally
http://en.wikipedia.org/wiki/John_Buffum
"John Buffum (born October 4, 1943, in Wallingford, Connecticut) is the most successful U.S. rally racing driver ever, winning 11 national titles and 117 national championship events.
In addition to his North American schedule, John Buffum cherry-picked rallies in Europe, where he became the first and still the only American to win a European Championship event, taking the 1983 Sachs Rally in West Germany and the 1984 ERC Rally in Cyprus, both with Audi Quattro."
The book:
http://www.johnbuffum.com/index.htm