Hey Ron, I have a ‘68 Concours Coupe 2-door that was purchased new by a family member. Really only difference between Malibu Coupe from what I understand is the Concours Trim (ZK7), that was apparently Buick interior and Concourse badges on the front fenders and dash. Read up on it a few years ago and as the story goes, GM went on strike so the plants were using whatever parts they could get. Interior can be purchased from Legendary which I am debating, since engine not original 307, may convert to buckets. Hope this helps.