[Morgester]

In California it would considered a SPCN (Specially Constructed) and would need to be registered as such.

I recognise that other states may handle "vehicle year" of replicas differently. In California this is a 2003 SPCN.

Assuming that an out of state registration was used to register the vehicle as a 65 Cobra, it needs to be fixed. Assuming the amnesty bill passes there will be no issue as to the possible perjury issue as to the true make and year of the vehicle. Nor of the value, assuming the true price was underreported. You just have to correct the information and pay what ever fees you should have originally paid.