In Calif. when you go to the BAR referee to have your smog inspection you go by the year the body most closely represents. But on your Title it will give the year the car was built and list it as a SPCNS vehicle. We can't register them as a 1960s vehicle, but when people put them up for sale they normally state that they have the SB-100 number which is the only way to sell one legally in this state. Some people put theirs is a replica of a 1965 0r 1966 Cobra.
Probably because that's the type of vehicle they're made to replicate.
This is my reason and always add that the car is replicar.Nothing wrong with cloning cars.Too bad the purists are so uptight about it.Had to Edit this last statement,Not all purists are the same.