Looks like a cool car. That's the original falling vinyl headliner that has separated from the foam backing. There's a giant single cardboard backing piece that is very fragile. Needs to be carefully removed and recovered.
Looks like the underside of the car was heavily rustproofed with Ziebart. That is removable with lots of elbow grease and some Gojo. Look what this member did to remove the that gunk just the other day on his '76 Bird. That Ziebart was an amazing preservative for pristine metal underneath.
https://www.yenko.net/forum/showthread.php?t=156730
BTW, Evaporust is a buffered solution that just chemically rinses the surface rust away without altering the metal underneath or the paint. Go through my thread and you can see what it can do for a survivor car - see what it did to the rusty driveshaft before and after. But you'd really have to steam cleam/pressure wash the underside to reomve the dirt and Ziebart before you could do anything with Evaporust on any bare metal surface - if there is any grease or dirt in the way, it is a waste of time.
https://www.yenko.net/forum/showthre...123936&page=14
By the way, I see in the photos that the key is in the run position and the gas gauge is reading 9:00 PM. :-) That means the fuel tank sender has gone bad. You can go through my other thread and see what is involved in replacing that unit (and finding a new sender for the weird 75/76 year cars).
https://www.yenko.net/forum/showthre...113621&page=16
In looking at the photos it appears to have had some paint work. There is overspray on both sides of the cowl in front of the winshield, near the fenders, that should not be there. The overspray is on top of the blacked out section as well as on top of the sealer at the cowl seam. The gas tank has overspray as well on top of the Ziebart. That Ziebart would have been applied at the dealership after delivery.