Anybody running 10s with a small block and factory iron heads

doesn't much matter. Its a bracket race at the end of the day.
Not many( if any) events where a stock or superstocker even if nowhere close to that far under the index cant compete.

Not always a bracket race....friend of mine in his F/SA 340 Barracuda 68 FB has two heads up races in the 1st Divisional Race in Vegas......1st one to the finish line wins