The 1966 Southern 500 was a Grand National (now Nextel Cup) event held at Darlington Speedway on September 5, 1966. Darel Dieringer led 105 of the 364 laps in route to his third and final victory of the year, holding Richard Petty at bay in the final laps. David Pearson, the eventual season champ, finished 3rd. Stats
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