About: 1966 Southern 500

The 1966 Southern 500, the 17th running of the event, was a NASCAR Grand National Series event that was held on September 5, 1966, at Darlington Raceway in Darlington, South Carolina. The transition to purpose-built racecars began in the early 1960s and occurred gradually over that decade. Changes made to the sport by the late 1960s brought an end to the "strictly stock" vehicles of the 1950s.