I put a '67 Valiant front clip... On my '72 Duster.... It's a bolt on, all the body panels line up, fenders are the same stamping. Hood and grille are the only difference. Everybody thought it was an early Barracuda or some factory prototype... Or were generally confused as to what it was. (No these are not my photos... I shouldn't have to explain that)
I don't remember any 2 door 63 Impala wagons . Maybe a custom version or there just weren't any around where I was .