What were the original NASCAR race cars?

• true stock cars
  The original NASCAR race cars were true stock cars, meaning they were no different than the family sedans being driven on American highways. How much does a NASCAR race car cost?
• muscle cars
  The original NASCAR race cars were true stock cars, meaning they were no different than the family sedans being driven on American highways. How much does a NASCAR race car cost?
• none of the above
  The original NASCAR race cars were true stock cars, meaning they were no different than the family sedans being driven on American highways. How much does a NASCAR race car cost?