Somebody callin' my name?? I have no real preference for either the '63 or '64 grill. The Previous Owner mounted those 7" driving lights but had to use the earlier grill for clearance.
I haven't checked for "screw to screw" compatibility because the grill has been working just fine and I've spent plenty of time and money on other stuff. There are a couple of black painted wood blocks on the ends of my grill that suggest that some mounting aspects had to be "massaged".
That fellow (God love him) had some "interesting" techniques for repair and modification, some of which were quite ingenious. And some left me wondering WTF??