Here's a link to the ebay auction. 1978 Grand Prix with 28K miles.
I don't think I've seen these seats before. I've seen them with the opening at the head rest but not clsed in and sewed like these. Even the rear seats look different.
Are these common on the Grand Prix?
http://cgi.ebay.com/ebaymotors/Ponti...1%7C240%3A1318