Please help me. Where do I find the VIN # on a f550 diesel engine 2000 model?

Need to locate on it tomorrow to check to see if another engine was installed or the same one rebuilt. Need to match with other VIN # on truck.

 

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i could be mistaking but i dont think it exists. as the motor is made by international. good luck i am sure someone knows for sure. although there is a int. # on the front of the hpop it is a sticker. there maybe some way to link this to the truck as far as a build sheet or some web site. if you are able to do it someone will surely chime in. do you suspect a motor transplant or something?