I asked a question about this a while ago, and Chick came through with NCRS guidelines on Delco cap 'R' usage for pre-'70 MY at least. That thread is http://www.camaros.org/forum/index.php?topic=15310
However I didn't learn when the caps changed over from 'Patent Pending R' to having the patent number, so would be great to know that if anyone can clarify!
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Tim in NSW, Australia
1969 Van Nuys 04A Z/28 from Clippinger Chevrolet.
Cortez Silver with dark blue interior.
Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
Last edited by ZLP955; 03-21-2019 at 09:08 AM.
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