I had good luck with the Torrance DMV - alot closer to Pasadena than Gilroy.
Now this was 3 years ago, but the manager was a car guy and took good care of us waiting in line in the wee hours of Jan 2 for our SB100's.
You might want to visit Hilbank Motorsports. They sell CSX and Superformance cars, new and used and should know the registration process for an out-of-state turnkey car.
Hillbank USA | Home
Good luck
Matt