Found: 1970 Dart Custom GT A65 code Burnt Orange 318 3 spd on the floor
Unlike ford, where "GT" got you at least a V8 (although it could be a 2 barrel), "GT" was never a performance package for Dodge.
It was basically- "bucket seats".
Not unusual at all to see six cylinder Dart GT's from inception all the way to at least 1969.
Not sure I've seen a six cyl 70/71 but my money says they are out there.
Anyone got one?
Maybe a I should check Hamtramckhistorical