Suggestion for finding correct instrument voltage limiter for 67 Dart

Thanks for the suggestions. When things would start acting strange on the fuel and temp gauges the amp meter would be at the max. I replaced the regulator for the charging system and went for a 20 mile test ride. Now I'm not seeing things acting unusual. Amp meter not maxing out, fuel gauge and temp gauge not going to the minimum on the gauge. Thinking maybe when the charging system went to the max the voltage went up too high and the voltage regulator for the instruments went into a protection mode.