Again, this is about Calif DMV. Once you do find out all the particulars, going through a private service(like AAA), can really help you. I traveled out of state to buy a certain vehicle that is NOT sold new in Ca. Since it is legal in the US, if it is used, Ca has to register it(after an inspection of the VIN#). The Ca DMV always send you to the Highway Patrol and they will complain about anything they can(non-standard lighting, extra lighting, Horn, etc), they can drive you crazy. If you know the law, and take it to AAA when they are not busy, they will sign off on it and get your registration.
Good luck!
Good luck!