Hi Ray, I think we've talked a few times... I was going to look at some doors you had?... Anyway, I know a few guy's in the area that have done a folding rear seat swap, and I'll check with them on this.

I know you'll need the stock side latches that mount to the body, and I believe the center hooks are eliminated. But I'll try to find out for sure for you. Until then, this may give you some good reference:
http://1968firebird.org/illustrated/interior/seats1.html

Talk at you soon! - Brett - 67 Drop Top 455!