- for future reference the stamped number is commonly referred to as the engineering number .The engineering number that is stamped on the part and used for visual identification is seldom the same as the part number.
To be truthful, the part number permanently stamped on the part is the actual part number that the Ford drawing uses to make the part, both for the original assembly line application and as a replacement part. The "other" part number is a stock number and inventory number, used by Ford Dealers service departments to identify and order the replacement item. An analogy would be the same type of system used by Amazon, Home Depot and your favorite liquor store. They have a stock number to order something that refers to a manufactures' part number. To simplify ordering and inventory requirements, the service number is (paint) stenciled on the part, stamped on the bag containing the part, identified with a paper tag, or identified with a stick on label. It's a system that can be confusing, but it works.
Jim