73 74 Ford Motorcraft 4300 4 Bbl Carb 429 460 D3VF-DA. Original Carb that is marked as 1973-74 Big Block. This appear to have been remanufactured at one point, but it has been sitting for years. #6-155 on the box. This likely needs to be rebuilt, or have gaskets replaced. #D3VF-DA.