Fwiw I had no problem registering and insuring my Grandpa’s ‘77 F100 here in California after it was totaled by insurance. Took an extra form to keep the original CA blue plates (normally you surrender plates and get new ones when it becomes a salvage title), but getting the salvage restored title was straightforward, just needed a VIN inspection at the DMV and Brake & Lamp inspection at a certified shop to check that the salvaged car is again safe to drive (headlights level, complete brake system inspection, turn signals, hazards, horn, reflectors, reverse lights). It’s as far as I know the only time California requires a thorough safety inspection of all those items.