I posted on this topic before, and still get confused from time to time.
so far I have found more that a few triple black cars with red hockey stripes in the midwest (mine, one 375hp auto - original owner, and a local 4spd car (wrecked). I also heard of another 375 hp in (minnesota?) with the red stripe).
The black convertibles I have seen, always have the white stripe. why would chevy treat the converts different than the coupes? The one triple black convert I know of is a 375hp car, but there are no original pictures of that car when new. the owner has had it for ever and said he is pretty sure it was a white stripe car.
Some of the old chevy advertisements have a 69 black ss car with white stripes (was that done for photo reasons? (red stripe may not show up well). it was before the cowl hood was offered, as that is not in the GM picture).
still confused on the red stripe rule for black ss cars, and why gm would treat an all black convertible different than a coupe. To me the current one on the camaros.org home page (for 69 model) should have a red stripe to go with the red interior. But I am sure the rules for black converts are that all of them get white stripes.
a wild opinion may be only 396/375 hp black coupes got the red stripes (so far that is all I have come across, oddly enough). black converts never get them so I can tell, even with red interior.