Hello buick experts. I have a 1967 GS with a 1967 455 engine. The ac I believe is from the 67 GS. I have a Rochester on a b4b intake. I am trying to find out where the vacum line goes to from the heater control valve and there is 2 vacume ports on the a/c flapper door that I'm unsure of where the lines will go fro. There as well. To make it better I have 3 lines coming out of the fire wall that I have no idea where they go. And pictures of engine bay set up or diagram or just any help really is appreciated.
Chassis manual would have a diagram for which color lines go where. Unfortunately, I don't have a manual for a 67.
https://www.teambuick.com/reference/library/67_chassis/index.php Just happen to have a link to a chassis manual for you. That Team Buick group over there is very good for the details