John,
If it's the same car, it was originally restored by Sam Cox. You can reach him at the number listed in the article below.
http://www.co.henry.ga.us/newsArticle.asp?AID=100#
It's the most accurate GSP car I've ever seen. Jim Y. made improvements to the GSP he owned for a short time and came close to this one, but that car was painted the wrong colors by a prior owner and needed a bit more work.