Aside from the aforementioned '60 Mercury grille, Mike Young's Gary Howard-built beauty sports one of the best. Though not widely publicized, I believe it to be 1967 AMC Ambassador (w/ '63 Olds lights.) It should not be too hard to find, nor to fit! This Caddy grille is another great possibility!
Here's my old Impala with a set of chrome reverse wheels. Sold it a couple of years ago, and now it's in New Jersey. The wheels were 14" x 6" both front and rear, with a deep offset on the rears.