The 1966 Gwyn Staley 400 was a Grand National (now Nextel Cup) event held at North Wilkesboro Speedway on April 17, 1966. Jim Paschal led 308 of 400 laps in route to a dominating six-lap victory on G.C. Spencer. It was Paschal's first win of the year. Eventual season champion David Pearson finished 3rd. Stats
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