Update for everyone: Title came in the mail today just like any other vehicle. It's a done deal now. Registered as a diesel, registration is in the glovebox, good to go. On paper it's just another old diesel, nothing special.
Not saying there's not a little luck involved, but I do think if you have patience and play it right you will get your registration. On my HZJ73 attempt I blew it by not being cautious, and I came into this one with a lot more knowledge and patience.
If you're determined to get CA plates you can do it. Know the laws, be your own advocate, know what the DMV wants to see on that paperwork, and what they would see on that paperwork if it was any old out of state diesel. Work with a VIN verifier, don't let DMV or CHP inspect the vehicle because they get tripped up on the WRONG things and will get you bogged down in their anxiety over the fact that it's not a Camry. Most importantly do not give the DMV any money until they're giving you plates on the spot. If they hassle you, take notes on what they're hassling you about, say "thank you very much, but I'm going to look into this a little more" and walk away to try again at another DMV, hopefully with updated paperwork. You are going to be sailing in some grey waters and you need to be comfortable with that.
I'll get a little soap boxy here: I am exhausted and the BS and conflicting laws and statements that punish collectors and enthusiasts while letting big industry off the hook for doing the actual damage but I do believe in the concept of emissions testing and vehicle safety. I have a diesel so that I get acceptable fuel economy to daily drive, I run B99, small percentages of WVO and propel biodiesel to practice what I preach. I hope some of you CA residents do the same.