From 1977 to 1980, when British Leyland dropped out of U.S. racing, he won both the SCCA ProRally series and the North America Rally Championships.

In 1981, he competed with an Audi 80 and Peugeot 504, but they were not competitive compared to Rod Millen's factory Mazda RX-7 rally cars.

[2] Since the late 1980s, Buffum has owned and managed Libra Racing based in Colchester, Vermont.

He has been responsible for building cars for the Hyundai Factory rally programme in the US and has worked alongside Vermont SportsCar on their Subaru Factory programme as a consultant.

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