I thought Charcoal was 87-89. No, my car does not have the original interior. I am starting to assume that it is titanium because the color is very light and I don't think it has a bluish tint to it. It's just kinda confusing cause my motor is from a 93 GT and I know they got some other parts from the 93 and so I thought they might have gotten the interior too, but I do know some of it is dyed from original red too....leaning towards titanium.