Every Nova I have had or seen had gray primer on the floors, I like to use DupliColor Hot Rod Gray Primer. Odd, my '62 Convertible has Light Gray on the exterior floors, but the inside of the car is red oxide primer. Regarding the Chrome around the windows, I have never seen a Nova with Chrome drip rails as in the picture, unless it had a vinyl top. The chrome around the doors and rear quarter windows is more common or no chrome at all. Both my '68 and '69 have no chrome around the windows, my '72 6cyl and '72 SS both have the chrome on the door and rear quarter windows.