My car’s SPD was 12/8/67. Every part that was on the car (I’ve owned it for 35 yrs) was datedslightly after that. Engine assy date 12/21 , trans assy 12/13, K-frame 12/22, int manifold casting date 12/11, etc.. The orig owner’s brother, who was with him when he picked up the car, told me that someone ordered the car and put a deposit down and they never came back to get it. Yhe car was sitting on the lot for s couple of weeks and his brother would go in and ask about buying it. They told him the first few times that the people were coming back. The last time , he told them , “ look, they apparently are not coming back to purchase it, I want it”. They sold it to him. That is what i know about it.