I bought my completed 78Z/250GTO in 8/07 along with an extra body kit.As far as I have been able to find out it is an old build 80's?? 6cyl auto ....what a pig it is ,the auto is a real boat anchor.I am planning a CSB and tko600in the very near future .The 2 body kits are the old Alpha kits. The original owner ,an older gentleman retired military. bought an extra body kit in case of accident and stored it under his porch. When he passed his widow had no interest in keeping it or building another.