Man that sucks, I registered my 91 70 series a year ago in california with no problems. I too had an out of state title, I think what made it easy was I used a third party VIN verification company instead of going to the DMV. I forget what the form is called but it is required with all out of state vehicles, the DMV usually does it, but you can also go to a outside place to have it done. It is about $250, where as the DMV is free but That way you walk in with the form ready to go and it draws less attention at the counter. I did have an oh s*** moment when the person at the counter said after typing in the VIN "I have to have a supervisor look at this" I sweated for about 15min until the supervisor punched some numbers and reached below and pulled a fresh set of CA plates. I've been doing my part in speeding up the climate change with a smile ever since.