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There should be a number stamped into the rectangular shaped air horn on the top of the carb facing the front .
It's the only way to tell accurately exactly what carb it is .
This will be the Holley list #. With it you can go to the Holley website and download .pdf files for that carb.
There should be a number stamped into the rectangular shaped air horn on the top of the carb facing the front .
It's the only way to tell accurately exactly what carb it is .