Evidence of dual exhaust is, I think, the Where's Waldo find.
So far we have a dual exhaust power top convertible with black interior. This is not a 67, and there is no poison ivy in the picture, but it does abound in the area to be sure. This is not in Oklahoma, but if there is an Oklahoma musical reference in there I'm not getting it.
Other than the obvious red exterior not mentioned, that might be it for this picture. Later this evening I'll add another one that will make the year obvious. In the meanwhile it would be interesting to see if anyone else can spot something that I can't and that nobody has yet.