I help a guy that runs a two barrel 350 wigned sprint class here in Oklahoma. It is a steel head and steel block class. At Okc we avg on a good night 25 to 30 cars this is on a Friday night. There are two tracks in Oklahoma within at least a two hiour drive that run the same rules. There is a series out of Tulsa that runs the two barrel class and they avg about the same number of cars.