Up for auction is a NOS 1966 Chevrolet Impala Chevelle fuel pump for the big block engines.   This is the fuel pump for the 396/375 and the 427/425 engines.  The AC Delco part number is 40358 (shown on part in photos).  The GM part number is questionable.  I think the GM part number is either 6416458 or 6416158.  The plating is nice.  Overall, the fuel pump is in excellent condition.  New and ready to install on your ride.