well as CA is always very progressive even there I would guess to throw out all gas engines which do last easily 20 years..panteras 50+ 
and Tojota's anyways is a mega political issue. I agree to do serious stuff on emission but the hype on going to zero on gas cars is in my view BS. Put collctors on the roof put a heat pump in the basement or use a fresh water heater on the roof.That will make quite deals. Ok in the US you folks lack decent public transport that is an issue, but can be addes at least for the last 10 miles to work keeping gas cars out of the city itslef with stop and go.
Well I go push bike app 2000 miles a year and run my vintage 3 cars max 3000 mile a year...WITH ENJOYMENT (most of the time unless something brakes ..ak Chuck!).
In EU the greens are on a hype but let us see how this materializes when real business comes in the way and the dad of "the FFF lady" is out of a job". We protested in the late 70th on student reforms..all good and necessary!
Ok they do "rejuvenation" on beatles with e drive woow..did not google but 25k€ and up..I still remember my 1962 with 1600 Posche engine with 40er Zentit 90 HP woow..
SO will be a long way for a CONVERSION..
Matthias