The AVS is a very good carb and I'd have it rebuilt. The carb number is usually stamped into the edge of the passengers side front foot.
To clarify something about the various makers of the carbs, Carter went out of business. Edelbrock bought the RIGHTS and probably the patterns to make the carb with their name on it, their carb is built by Weber.
Federal-Mogul got I believe the whole Carter empire and made the AFBs for a few years, then quit production. So it was F-M that killed the Carter AFB.
R.
