Hi Jack,
I was told something different by DMV in California regarding SMOG and older cars. I was told that SMOG testing applies to all cars 1975 and newer. I was also told that the 30 yr old rule that we used to go by no longer exists, and that it won't be reinstated. I hope that you are correct though, because I have a '79 MGB that is giving me fits regarding SMOG testing. I recently took it to the SMOG referee and got a 2 yr waiver because no one seems to be able to make it pass.