I need to check the rest of my firewall but I do remember below the heater box on the passenger side there is a SS mark in some type of chalk or crayon, I noticed it when I took the fenders off.Hi Carl 1962, I too have a 62 SS car, built in VN California 30126, same color 812/948. Its under
restoration at the this time. I did find some interesting things when tearing it down. Under the
heater box on the cowl, I found in chalk marks SS, and under that further down a 46, and on the same side of the passengers cowl side, the Large Letter P. The other side of the cowl, right of the hood hinges and down, the numbers 412, 48. My vin ACC is 30 EZI SS. Hope your having fun with your car. My car came with org. 327-250hp Powerglide, post rear 3:08.
Steve