Hello JWC66K,
I have a C5ZF-E 4100 (has tag and also stamped C5ZF-E on left front corner of base) that I am finishing a very quality rebuild on (but not concours). Been doing these for 47 years and guarantee all my work. Carb has no corrosion on any parts and has original plating on levers etc.
I will be done with the carb tomorrow (5/22/15), and can send pictures if you give me you're email address.
I want $350 for it plus shipping.
If interested, let me know. I p[lan on listing it in the "parts for sale" section, unless you are interested.
Thank you Sal.