The Carter WCFB was identified by a tag, which originally was placed under the drivers’ side rear airhorn-to-body screw. Various sources have attempted to positively identify WCFBs by casting numbers. This may be done in a few rare cases; but generally this is unsuccessful. While the various sources MAY be correct with their casting number tables, generally they are unaware that other carburetors may have used the same blank casting, machined in a different manner. Therefore, if one knows the carburetors identity, one would know what castings would be present; but the reverse is certainly not true. The reader should use any such tables with the proverbial “grain of salt”.