Sunday, May 25, 1975 – Richard Petty, a winner on nearly every track he’d set foot on, earned his first at Charlotte Motor Speedway’s 1.5-mile layout when he captured the annual World 600 before an announced crowd of 90,000. Petty finished a lap ahead of runner-up Cale Yarborough and four laps in front of third-place David Pearson.
• The victory was No. 170 for Petty; he did have a previous win at CMS, in 1961, although it was a World 600 qualifying race (67 laps; 100 miles) that counted toward a driver’s career win total at the time.
• The race was the first career start in the series for future seven-time Cup champion Dale Earnhardt. The 24-year-old finished 22nd in the No. 8 Dodge fielded by car owner Ed Negre. It was Earnhardt’s only start of the season.
• 1970 series champion Bobby Isaac made just his second start of the season and finished 35th in the No. 63 Chevrolet of Norris Reed.
• Darel Dieringer, 48, returned to competition after a layoff of more than six years. Dieringer, a seven-time winner in the series, made one start in 1969 – finishing 25th at Macon, Ga., then came back to run four races in ’75.