vin question

If the state assigned VIN is in fact from the body stamping's from the core support or left rear quarter panel lip. It will not be the same as the original VIN assigned. The hidden stamps used the S.O. number until 69 and not the last 6 of the VIN.

There is no way of knowing the factory assigned VIN for Chrysler Historical to get the build card, unless like you said he can find the broadcast sheet under the rear seat or something. The VIN given by Cali probably has no significance but to them.

What are the hidden body codes? Perhaps there is some correlation between them and the California VIN number assigned? BUT even still, with them, there is no way to determine the factory VIN to obtain a build card from.