HEI Race DistributorDesigned to meet the high performance demands of racing competition, these units fit Chevy small block and big block engines. These 100% NEW distributors have all the reliable components of the 66940, but they also include a highpower 50,000 volt coil. This high performance distributor produces a 50,000 volt spark through 7,500 RPM with true spark alignment for instantaneous response, a high performance curve, a premium cap with brass terminals, and a