Jo Siffert of Switzerland stands beside the #6 JW Automotive Engineering Gulf Porsche 917K during practice for the International Championship for Makes BOAC 1000 Kilometres of Brands Hatch race on 3rd April 1971 at the Brands Hatch Circuit, Fawkham, Great Britain. (Photo by Rainer W. Schlegelmilch/Getty Images) *** Local Caption *** Jo Siffert