Wanted: Carter 4933 Carburetor (Rebuildable or Working)

jeff alder said
what does the s mean on the end of a carter carb part number - Bing this is a good article

Thanks, but I didn't really see where they explain if my 4speed w/out A/C requires the soloniod?

From that link on the (S) at the end

"Carter used the suffix letter S to denote assembly. Since all carburetors are composed of multiple parts, the letter S was appended to all carburetors using the traditional numbering system i.e. 938s."

I am a little confused, they put the (S) at the end to denote assembly? Does that mean, all carbs put on assembly line cars got the (S), where as an over the counter purchase of the same carb did not get the (S)?
Thanks for your help, I'm pretty green to this stuff :)