Help... Vin #'s dont match

The core support is off the same car the dash frame/vin is from. That's my guess.

The original last 8 of VIN for the rest of that car is much more likely what's on the package tray. Who knows what that car came with.

Say someone had a 340 car that he rolled and had a clean /6 car. Takes the core support off 340 car and installs dash in the /6 car, is it a 340 car or a /6 car? What do you call what occurred? I know for a FACT, it's not a numbers matching car. Why not swap the parts over and keep the vin from the shell??? Hmmmmm

The core support numbers could be pretty scattered in stamping.

Figure out what you want to do and go with it.