What type of dart do I have?

A year ago I bought a 1966 Dart GT, the configuration seemed quite strange to me, since it has:


I understand that this configuration came on the dart charger, but only on the 65.

Could someone give me a guide on what I have? thank you!

Captura de pantalla 2024-08-04 a la(s) 7.40.03 p. m..png