Happens here with buses too. This company alone has over 40, 84 passenger flat noses. So sometimes at mid life one bus might get a bad fender bender. Many times the worst is the parking lot rash, but sometimes its like the one with the parking brake failure. Entire front end smashed. Another bus with a rusted out rear clip, So two buses get made into one.
Other factors like buses that only do dirt roads here will be wore out at half the service life of a bus that only did paved surfaces. It would still have a clean vin. So the bus with the front end damage could adopt the clean vin once repaired.
This is why I love rat rods. What vin would you like? Cabs are sometimes home made. Engine has a number, same with diff's transmission, ect.
However none of the under hood parts are required to be left original here in Alberta Canada. So again, what number would they want?
I love the few, unenforced loopholes left in the law system. But we are loosing more and more of them each day.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization