This April 15, 2004 file photo shows Carroll Shelby sitting on a 1968 GT500 KR during the celebration of the 40th Anniversary of the Ford Mustang at the Nashville Super Speedway in Lebanon, Tennessee. Shelby, the greatest single influence on America's racing posture in the post-1945 period with help in the engine design and racing operations of the Mustang, died May 10, 2012 at the age of 89.