The 2 dr Concours seems to be a mystery car. The VIN is same as Malibu so that won't tell you. I found somewhere that the trim tag may have 178, a Buick code. Some of the interior pieces seem to come from either Buicks or Oldmobile. Here is a link with some pictures of what you should look for. Like split front bench seat with armrest. Carpet on bottom of door panels. Also Concours tags, not Chevelle or Malibu, inside and out.
Take some pics for us.
http://www.hubgarage.com/mygarage/68...vehicles/57912