Doug,
Yes the short answer is you would have to go through the process. I don't believe they had kit car Cobras in 1965. Here all legal ones have to have the SPCN on the title and the year the car was sold. Year first sold may have 0000 or be blank as I have seen on a few of the guy's titles. Otherwise you will have to meet the emission requirements for whatever year you bring the car into the state.
Hey Ernie, I know where you can buy 14 Catalytic converters cheap. They are becoming a big item around here for the thieves. It is amazing at how many are being cut off of vehicles during the night.
Ron