I do not personally know the car just saw the add on Hemmings. http://www.hemmings.com/classifieds/carsforsale/buick/gsx/439933.html Mark
I'm pretty sure this is the car that was for sale at the 2006 GS Nationals for $40K with no takers. At the time, it had a '70 SF motor and was owned by two brothers from NJ. They claimed to have the original block. I've seen it pop up for sale from time to time since then. Also, there was no documentation that the car was a real "X" other that an old, undated photo showing the car in it's current configuration. If it's the same car, the document he's calling the "build sheet" is some small piece of paper that you sometimes find under your carpet from the Fisher plant. There was nothing on it that denoted GSX. That would come from the assembly line.
