Backtrack, but forgot to post this ages ago. These are the last couple of emails I received while speaking with CARB and the modification center.This is good advice. The people at CARB, at least the ones I spoke with, are way more knowledgeable and willing to discuss the ins and outs of their regs than the people at the DMV. I would absolutely call CARB and ask politely what the deal is. If you can, get them to email you whatever they tell you over the phone.
Regarding requirements and cost -
"Your vehicle requires modification, testing, and certification to meet California Standards. The cost is $9,950.00 and will take approximately 8-12 weeks to complete. Should you decide to pursue the certification of your vehicle, so you can register it in the state of California, please contact us at (714) 545-9503 ext. 219 to schedule the inspection of your vehicle.
Please provide a copy of all documents related to your vehicle such as the foreign title and customs entry forms. Thank you
N*** G*** "
Regarding work performed -
"They add a new emissions control system, emissions dyno tuning, CARB FTP testing, Certificate of conformity, etc…. It’s a process and takes time. Good luck
N*** G*** "
Basically what you'd be looking at to get an old 70 series diesel registered in CA.