This is a real deal New Old Stock AC 4432 fuel pump. I believe the GM part number for this pump is 5621637 which was later superceeded to part number 5621665. This pump fits 1958 Chevrolet fullsize cars with the 348 engine. It may also fit other years and engines. Please confirm your specific application.
This fuel pump is in New Old Stock condition and has never been used or installed. I do not have the box for it but it is clear it is new and has no witness marks from ever being installed. Even the original green paint mark on the stamped 4432 on the side of the mounting flange is intact. You will not find a nicer AC 4432 fuel pump.
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