Depends on how you look at it I guess. Kind of a modern day Ship of Theseus.
https://en.wikipedia.org/wiki/Ship_of_Theseus
To me, everything that makes the truck what it is is in the VIN. I still haven't figured out what I'm going to do with my truck, but it'll never look like it did when it was new, I know that much. It'll always be a Street Coupe to me though because its VIN says so.
Kind of brings an interesting question, which is better - a real Beau James that has been modified so extensively that nothing BJ is left, or a regular everyday GMC that has been made into a Beau James clone? Neither one is really what they say they are.