I didn't mean these were factory body shims. These are aftermarket body shims is what I meant or at least that's what I used in the shop for years. No the original shims were not zinc. Sorry for the confusion but he did say he bought them at a parts house so I took it for granted he understood they sold him body shims instead of front end alignment shims. Maybe these are alignment shims that they use now. I've been out of the business 20 years.
For clarity the bright zinc shims in the photo at the top of this thread are currently being marketed by the parts houses as factory correct control arm alignment shims for 67/8/9 Camaros...I didn't purchase them.