Converting a 63 Valiant front to a 65 Barracuda?

What contours wont match?

You can use the '63 fenders with '65 Barracuda hood, grill, valance and so on. They will match up in every way. But you will of course have the deeper V-shape in the fenders that was not so prominent on the Barracudas and '65 Valiants.

Enclosed is a picture of a '64 Signet with Barracuda grill that has the front end look you will get ('63 and '64 fenders are the same)