Your car us certainly nice! As to the spinners, I am a fan of the stock white but that could just be what I am used to. Another option is to remove the spinners from the white caps, and install on a nice set of non-spinner black caps. The one black and pewter '59 you see in the magazines uses that black cap with the spinners. It looks sharp on that car. If it were my car, I would leave them white. With the wide whites, it makes the caps look extra "crisp" (whatever it is I mean by that...)
Let me know if you still need a template for the holes for the side louvers. My car is down at the body shop and I can try to make something to help you out.