Perfect Storm: The 500 and fight that changed NASCAR forever

FILE - In this Feb. 18, 1979, file photo, Donnie Allison, in car 1, and Cale Yarborough, in car 11, crash on the last lap of the Daytona 500 which put Richard Petty in Victory Lane in Daytona Beach, Fla. Donnie Allison and his brother Bobby ended up in a fight with Cale Yarborough because of the wreck. The 1979 race was instrumental in broadening NASCAR's southern roots. Forty years later, it still resonates as one of the most important days in NASCAR history. (AP Photo/Ric Feld, File)

FILE - In this Feb. 18, 1979, file photo, Cale Yarborough, right, kicks and pushes Bobby Allison, center, who is catching his leg as brother Donnie, left, tries to pull his Bobby free from the fight which started after Yarborough collided with Donnie on the last lap of the Daytona 500 auto race, taking them both out of the finals in the race in Daytona Beach, Fla. The 1979 race was instrumental in broadening NASCAR's southern roots. Forty years later, it still resonates as one of the most important days in NASCAR history. (AP Photo/Ric Feld, File)

FILE - In this Feb. 18, 1979, file photo, 41 cars roll around the wet Daytona International Speedway track under a caution flag as the Daytona 500 auto race gets under way in Daytona Beach, Fla. The 1979 race was instrumental in broadening NASCAR's southern roots. Forty years later, it still resonates as one of the most important days in NASCAR history. (AP Photo, File)