No, I want to say it was 346 on the roof or something along those lines. I always wondered how many in-service units were used during the filming. You would sometimes see units that were several years old with the old mechanical sirens and some war wounds in the background or being driven by "back-up" officers. It seemed to happen less frequently as the show progressed, probably because the studio had simply changed the shop number on the cars that had been Adam-12 when new.
Mike, shoot me an e-mail when you get the chance, I lost my address book when i transferred...