Thunderhill Raceway Park, Willows, CA May 16–17, 2009 David Olson and his minimalist 1950 Jaguar XK120 raced for Group B honors.Photo: Jim Williams Steve Cook’s 1974 March 741-Cosworth was one of two F1 cars in the large formula car class.Photo: Jim Williams Peter Giddings brought out his 1950 Frazier Nash Mk1 LeMans Replica.Photo: Jim Williams Ross Lindell’s 1963 Sprint Speciale and Sid Gage’s 1957 Giulietta (58) head this pack of Alfas.Photo: Jim Williams