Hi guys, I'm thinking of buying an 81 Cadillac Superior. The big thing holding me back is that the casket floor (is that what the surface in the rear interior is called?) needs to be replaced. How big of a job is this? Anyone attempted it? I'm assuming I'd have to take out the wheel covers (beneath the interior lights) and partition cabinet in the interior. I don't even know how these are removed! Please fill me in.