The Bastard 1/2 65 & 1/2 66
Send me the VIN and fender tag info and i will decode it for you, your build date might have something to do will all this stuff too...... this could be one of those odd balls.
Yup sheet metal is all the same, in fact the cars from 4-6 both Valiant, Barracuda and Dart are almost all interchange able.
I have a 65 Valiant signet, with a 64-5 grille with a 66 Dash..... mix and match make your own......