68 Barracuda rocker trim

Hey Guys

I picked up the rocker trim for my 68 Barracuda that I am building and have a few questions about it. Did this only come on Formula S cars, how rare is the trim, does it need to be used with wheel well trim and was the main piece all polished or did it have black in it as well??? Any pics on a car would be great as well.

Cheers
Derrick