Daytona International Speedway March 10 1973Daytona International SpeedwayDaytona, FL 250MX Results 500MX Results Results Home 1973 Results Daytona International Speedway Live & On-Demand Learn More * all times Check back for a full broadcast schedule closer to the race. 1973500MXFull Results PierreKarsmakers1st MikeRunyard2nd BradLackey3rd 1973250MXFull Results BobGrossi1st JimWeinert2nd GaryBailey3rd