Dan & Mark
I may have found a chrome AC oil fill cap with 3 spot welds for my 65 GS California Beauty Kit with the rubber hose going from the chrome valve cover apple to the air cleaner body like Dan has in his convertable restoration project.
I have attached pictures of the one that came with my kit.
The last owner said his grandfather bought the kit with his brand new 65 GS in Phoenix AZ.
I just received a new (Pontiac) Ames Performance Engineering catalog # G28 and on page 173 item # N225F is a picture of the closest thing I have seen yet.
The description says "This new reproduction has the AC logo and 3 visible spot welds. We have seen this style cap on several low-milage cars. Application: 1967 w/Calif emissions, 1968-69 all". They are asking $34 each.
Perhaps there is someone out there that can share some additional light on this subject for Buick applications.
MDKD
Milton