That is a T3 GT. It has very little deminsion similarity to the real GT. The headlight boxws are much longer and deeper than a real GT.
Here is a link to a photo of a finished one. I believe this company went out of business in 2002 or earlier. That is not a fiberfab avenger or any other early kit company. You would need the chasssis for that car or you will have to custom build it.
http://image.kitcarmag.com/f/1207430...rd_gt40+t3.jpg
Cheers,
Hersh