or call the CHP (california highway patrol), they'll come to you and just one Vin # (vehicle identification number) is required , they have the proper forms for you to submit to the DMV (department of motor vehicle) I suggest going this rout. the DMV ran me around loops with a vehicle that had only one VIN # , CHP cleared it up .
it's an antique restoration, the motor may have been changed out and the DMV can not think beyond their computer . leave the car at home.
Then with the proper form signed by a VIN officer go the the DMV for an Application for Title , you should walk outta there with new tags and current operable registration,
then once notice comes to show proof of insurance, do so or let it laps as I did and opt. to non-op. it.
Mine will sit for a few years so the incurred fees will not amount to much.