[68SSCamaro]

You need to check with original 67 car owners to see if the '5995 has the codes stamped or not. I seem to remember no for 67. Does the Assembly Manual show a spacer behind it? Yes, the 3874412 is a single groove stamped steel pulley. My notes say the code is A. And the alternator pulley is part of the fan. My notes say no code but I don't remember ever seeing one. Sorry that's all I can help with. Martin