Newbie wondering what year/style of bucket seats are these

Sounds like the backs may be "sun stroked"?? I would look for another set of backs and while searching for those try to repair yours? You could cover them with a thin vinyl/fabric?
Yes could be! I think I’ll try and fix these up with some sort of vinyl or something and try to find the best place to get the seat backs from ie. any Canadian companies
Thanks again