Identifying the correct kit for a Stromberg AAV or AA 2-barrel carburetor depends heavily on identifying the specific unit's identification number. Since these carburetors were used across many different vehicle makes (like Buick, Cadillac, and Packard), the internal components can vary significantly.
If you are trying to match a kit without a tag, here is a breakdown of how to narrow down your search:
1. Locate the Identification Number
The Metal Tag: Look for a small triangular or rectangular brass tag held down by one of the air horn screws.
The Flange Stamp: If the tag is missing, check the flange face (the flat surface where the carburetor meets the intake manifold). Numbers like 380198 or similar 6-digit codes are common identifiers.
2. Comparison Methods
When a number isn't available, you must perform a visual and dimensional comparison of the kit components against your existing parts:
3. Model-Specific Kits
If your carburetor belongs to a specific model series that only appears in one kit (e.g., certain heavy-duty or late-model versions), that kit is your definitive match.
Note: Because the AAV series was produced for decades, "universal" kits are rare. Always verify the plunger style on the accelerator pump, as this is the most common point of failure and the part that varies most between kits.
