After an exhilarating AdventHealth 400 at Kansas Speedway, the NASCAR Cup Series is headed to Darlington Raceway this weekend, for a Mother’s Day spectacular. This weekend also coincides with NASCAR’s famed throwback weekend, so the paint schemes will pay homage to the sport’s illustrious past. Two of the drivers who helped shape their eras, Richard Petty and Jeff Burton, got together ahead of Sunday’s race to speak about what makes Darlington special. According to Burton, the challenge that the track presents is what makes Darlington great, as the fans can tell the drivers are having a tough …