I just purchased a 1965 GTO and i am in the process of documenting it. I am stuck on one date code and in searching all over the internet i have not found anything that would help. On the rear of the frame facing the outside of the car on the drivers side there are two numbers. One number is the part number of the frame (9780911). And the other number i beleive suppose to be the date code (012144N2). I am not certain but i wanted to throw it out there to all of you for confirmation. I do understand that the seriel number of the car is on the same side of the frame but on top of the frame which is unaccessalbe. Any help would be appreceated.