RaceSaver®…a national brand of sprint cars that supports a proven set of rules. 
The RaceSaver® brand is sanctioned by IMCA which forms a series of events throughout a calendar year with a points type of system to determine status of starting positions, etc. 
The RaceSaver® brand requires a yearly membership through the sanctioning body along with a dedicated Hard Card system. 

The engine must be a 305 and ran with a set of RaceSaver® cylinder heads and is enforced by the proven set of rules thru the Hard Card system.