That's a couple of real nice cars you have. I have a white 96 Z-28 and I once had a 78 yellow Firebird Formula (350).

Here's an old picture of it:

 

Looks like a super nice formula... I still am gunna have to pull my 79 back into the paint booth and get it right. The mix was bad on the current paint job. However, I might as well repaint it, because it looks like a 406 has just found it's way to me, so I'm ready to rock it. It'll be a whole new car when I'm done.

 

My '95 Z28 is solid polo green metalic. With t-tops.

 

The option was called "monochromatic roof" and also included the mirrors. It was available on all cars, except black ones. I forget what year it started as an option.