With respect, Excel rims don't suit any vintage bike. The rim shape and contour and colours are all wrong and that big whopping Excel sticker on the rims is non period awful. If you want to make a good period replica Fox bike, use Sun rims like E74 suggested.
As far as black rims, I was one of the first to have black rims on my Maico 350 and thought they looked cool when I did it in the early 90s. Today, I'm a little more sympathetic to period authenticity and I wouldn't think of any other colour than silver or on an evo bike, a subtle gold.