Not sure how to categorize this question?

[Duff33]

Lots of broken down and rusted buses out there. Lots of replacement parts available. What is the least amount of pieces you need to consider it an original car? Meaning, I can replace just about any piece needed so what is to keep someone from just building their own bus from scratch? M-Code plate? VIN Plate?

Thanks for watching.

[lightice]

The only thing that matters in terms of ID is the chassis VIN stamping.
All others are supplementary to it in terms of legality in most parts of the world.

So yeah, that piece where the VIN is stamped on the chassis/body.