[jerry67]

For even more proof look at the following pics, in the first one you can see the 68 dash pad and inner door panel, you couldn't install that over the metal top of a 67 door, even the weatherstrip is 68 you can tell by the top of it, second pic is a 67 weatherstrip
In the next two pics you see, I assume Grumpy reaching into the back of the car, you can see the top of the astro vent by his knee, then a pic clearly showing the car has the astro vent even the rear windlass looks to be 68 because this is a 68 camaro
The last pic is Dales car it has an early style 67 only quarter, referred to as the telephone receiver style, that's most likely the original quarter and would never have had an astro vent installed it wouldn't even fit flush in that quarter