BRISTOL, Tenn. -- NASCAR made a flurry of procedural changes ahead of its first Cup race on dirt since 1970.
Bristol Motor Speedway converted its facility into a dirt track in an experiment on a revamped 2021 schedule.
It marks the first dirt race for the top series since 1970 and NASCAR is concerned it could be a disaster.
The stock cars proved too heavy for the dirt and tire wear dipped to dangerous levels during practices.
NASCAR the day before the race said it was making pro-active moves to save the Sunday's show.