1975 NASCAR Winston Cup Series
The 1975 NASCAR Grand National Winston Cup Series was the 27th season of professional stock car racing in the United States and the 4th season in the modern era of the NASCAR Cup series. The season began on Sunday, January 19 and ended on Sunday, November 12. Richard Petty, driving the #43 Petty Enterprises STP Dodge scored his sixth NASCAR Grand National Series Winston Cup Championship. Bruce Hill was named NASCAR Rookie of the Year. NASCAR introduced a new points system for 1975, a system designed by statistician Bob Latford. For the first time, each  race on the NASCAR Winston Cup Grand National schedule carried an equal point value, a system that would be used for 36 seasons, from 1975 to 2010. The original points system ran for the first 29 seasons, from 1975 to 2003. Richard Petty's championship would also be the last for a Dodge driver until Brad Keselowski in 2012. 1975 Season races. Round 7: Gwyn Staley 400. The 1975 Gwyn Staley 400 took place on April 6 at North Wilkesboro Speedway.The race was dominated by Richard Petty, who led a total of 311 laps and won by a margin  of over three laps. Round 17: Nashville 420. The 1975 Nashville 420 took place on July 20 at Nashville Speedway. Cale Yarborough dominated the race after passing Walter Ballard on lap 50, leading the rest of the laps afterwards and winning.