14 in. cop steelies

They are 14", his outer diameter measurement is to the lip but look where the bead actually seats....Plus, I don't think f-bodies came factory with 15" rims unless it was a Petty 43 Volare or Aspen Super Coupe car.
Add the Aspen/Volare cop cars to that list. Depending on the engine ordered, F body cop cars had 15" wheels standard or optional.