1975 World 600  The 1975 World 600, the 16th running of the event, was a NASCAR Winston Cup Series racing event that took place on May 25, 1975, at Charlotte Motor Speedway in Concord, North Carolina. There were 40 drivers on the grid. Coo Coo Marlin had an engine problem on lap 33 out of 400 laps - earning him a last place position and $1,455 ($ when adjusted for inflation). Richard Petty would defeat Cale Yarborough by one lap in front of 90,600 spectators. Petty would earn $30,290 ($ in when adjusted for inflation). Dale Earnhardt would make his debut here; finishing 22nd in a Dodge vehicle. Randy Bethea would race his only NASCAR Cup Series race here; he would complete in 251 laps before engine problems relegated him to the sideline. Joe Frasson failed to qualify for this race while Darel Dieringer would make his NASCAR comeback here. Richard Childress would also compete in his event; finishing one place behind his future employee Dale Earnhardt. Both drivers were running at the finish, 45 laps down. Other drivers who failed to qualify were Bill Dennis (#20), Ferrel Harris (#82), Carl Adams (#65) and Elmo Langley (#64). Section reference: