1968
Per CRG: Exterior Related Pargh. 9
Body sill black-out paint was applied to Z22 (RS) cars in 1967 and 1968 and to Z21 (style trim) and Z22 (RS) in 1969.
-vs-
Per Page #3 Body / Exterior - Paint
LEGENDS JUDING MANUAL 1967 and 1968
*Rocker panels should have the correct semi-gloss paint on those with style trim or rally sport and the body paint codes called for. 1968 cars with rally sport or Z21 trim will have the correct paint cut-offs in the door jambs.