Jon G - after a week of "Mondays" such as this one, he is grouchy as well as cranky!
OP - Rochester did not make a type "C" carburetor, even though a "C" may appear on the castings; it is a type B.
The tag number will be useful in determining the correct rebuilding kit. If the tag, like most of them, is ancient history on your carburetor; look for a stamped number on the cast iron throttle body (lower casting), and raised numbers on the other castings. Sometimes we can identify the pre-1955 type B's from the casting numbers, at least far enough to produce a kit.
Jon
