Electronic ignition upgrade / voltage regulator question

The big problem was that the old style voltage regulator was just an on/off switch. These little spikes propagated through the electrical system and could fry the ECU of the electronic ignition. There are electronic versions of the old style mechanical regulators avaialable that look like the mechanical but regulate like the newer electronic. the difference in placement of teh regulator in the circuit is why the newer requires two wires. Old style -hot to regulator to alternator to ground; new - hot to alternator to regulator to ground