[Supercar_Kid]

Be careful here...modern American Torq Thrust caps are a bigger pattern than the original American wheels of the 60s-70s. They aren't interchangeable. You need small pattern old style caps (American does still produce these) for the original smaller hub opening in the original wheel design, and the modern shorty billet style will only fit modern wheels. The SS, GTO, Ford, and other variations are all based on this new bigger diameter cap and are for use on new wheels only.

I know it's a subtle difference that's often only learned after buying the wrong set of caps.

Generally speaking, newer Americans use taper seat lug nuts like steel wheels use and big pattern center caps, while original 60s-70s Americans use mag shank nuts w/ washers and small pattern center caps.