850 holley

First off I know nothing about this carb. I bought it a few years ago with intent to use on a 422ci small block but ended up with a demon. I got this carb from an engine shop was told was used for dyno pulls and that was it. I can't confirm or deny that. It's very clean and I suspect it's a china main body with Holley guts but again I don't know. Will trade for 1406 or 1407 Eddy or $250 + shipping obo bay city wi

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