The 1990 AC Delco 500 was a Winston Cup (now Nextel Cup) event held at North Carolina Speedway on October 21, 1990. Alan Kulwicki led 151 of the 492 laps and held off Bill Elliott for Kulwicki's only win of the year. Points leader Mark Martin finished 11th and kept a 45-point edge on Dale Earnhardt (10th). Stats