What the Heck?

Gt would have the 225 rather than the smaller 6. also the 4 speed came out in 1964, in 1963 it should have either the 3 speed manual or the auto.
maybe if you posted a photo of the car and the ornament it would help us with identifying it with you. some stuff may have been changed over the years the basic car is the same from 1963 through 1966 and parts are interchangeable between the Dart and Valiant/Barracuda