Location of 5.4 vin number on engine

I know the VIN can tell you a lot about a vehicle, and I believe engine size is among them, but the engines serial # I dont think is tracked that way. What you may be able to find is multiple engine #'s from the block as well as other parts, valve covers etc, and see if the numbers match.

Some of the ford truck sites delve pretty deep into the VIN data, you could start there.
Maybe one of these can help

https://www.fleet.ford.com/partsandservice/vin-guides/

https://www.ford-trucks.com/forums/vindecoder.php