Carter AFB carburetor. I took it off a 327 Corvette. Ran but surged at low speeds and due to the choke placement you couldn't run a stock air cleaner without a riser. Note that the choke assembly is higher than say on a 3721. The choke is also frozen so you will need a new choke assembly and one of the covers on the top is missing as shown in photo. On one side you'll see cotter pin where a cover should be. There is no number on this, for some reason rebuilder  ground the numbers off. This is being sold as parts, core or to be rebuilt. It is a nice clean body and nice casting. Email me questions before you bid. Ship to lower 48 only