Bristol: Kyle Larson vs. Ryan Preece; where is the line on retaliation and NASCAR officiating drivers; the future of dirt racing in Cup; making penalties transparent

NASCAR on NBC analyst Jeff Burton on why the Bristol Dirt Race finally delivered a winner with a dirt background; the improving conditions on dirt in the race’s third year; who was right and wrong in Kyle Larson vs. Ryan Preece; Larson’s overlooked inherent aggression as a great driver; where are the lines on NASCAR retaliation?; should NASCAR get involved in officiating driver disputes; should NASCAR race dirt at Bristol again next year?; Martinsville Speedway preview; why NASCAR should make its penalty and appeal process entirely transparent.