I contacted the dealer last night and got a call this morning. They said they did not keep records from the 60's.
I guess I will have to figure out other avenues. My car has been out of the registration circulation since the 80's. I don't know why but I last received 83 tags after I parked it and that was it. Later I found out it had been purged from the system. So now I have to jump thru hoops to get it back registered when it is road worthy. At least I have the black plates and the last registration plus the pink slip. Maybe DMV will be able to find something out. I know my friend bought it in 72 and that is as far back as I know till it passed a few hands and I found it in 74. the block is a smog block meaning it is stamped for a smog pump but I am not sure if Orange County required smog pumps in 1966. I know LA did but San Bernardino didn't from what I have been told.