My '67 SS - 396/325 has the striping and from my research has had it from original purchase. I have copied and pasted this from a reply over at the TC site............
For 1967 Camaros:
All cars ordered with the Style Trim Group (Z21) got the side pin stripes, wheel opening moldings, and bright roof drip gutter moldings.
All Rally Sports (Z22) have the side pin stripes because the Style Trim Group (Z21) was part of the RS package.
SS cars only got the bumble bee stripe unless ordered as an RS/SS or an SS with the Style Trim Group. Then they would have both the bumble bee and side pin stripes.
The whole thread showing my car from 1967 and the rest of the replies........http://www.camaros.net/forums/showthread.php?t=104073