I installed a electronic ignition conversion kit from Mancini Racing. I noticed when the engine is cold (fast idle), the system is charging at 18 volts. When the idle comes down, it charges at 15 volts. Before the conversion it was charging a little under 14 volts. I grounded the ECU directly to a ground from the battery. If I need to change the voltage regulator should I go to source like Classic Industries, Year One, etc. or go to an auto parts store. Thanks.