I am restoring a 69 396 AC car built in Nor. Nov 68. The water control valve # 3940250 on my car I believe is original. Riveted to the skirt. Has the extra stud next to the vacuum port. It is stamped with "Ranco" as the manufacturer & "Type H 25". I took it apart to replate it Gold like the repo I bought but inside it looks Silver Zinc.
I can't remember seeing a silver valve, same part was used on Corvette, and haven't found anyone who confirms it should be silver. Found a picture in my archive of a Yellow 69 with what appears to be original valve in silver. I don't know where I got that picture.
Does anyone have a car with an original valve that could verify the plating color?