Gauge Question

Hmmm every 65 US Dart cluster i’ve seen has the voltage limiter within the gas gauge and would have 3 prongs. I bet @65dartcharger would be interested in this thread as he is quite the expert on 65 Darts. Strange yours has only 2. If it were externally mounted, it would be readily apparent on the circuit board. If you pull the cluster to double check everything, post pictures of the front and back - I’d be interested in seeing them