Help... Vin #'s dont match

Shoot, I've transplanted the whole rear sections of cars, package tray and all, and never even thought about "registering it"

Who would I make the change with, do you think they'd know how to change half a cars vin #. What proof would I need where the parts came from.

I'll soon be changing a rad support, do I "register" that change?

Any body folks out there re-register when a numbered body panels/supports, are replaced. ??

I'd be very surprised if your PM box isn't full with offers to buy your non-numbers matching car..

jmo