You do not need to switch out emissions components to California smog
components, however you do have to replace the carburetor, ignition system
and exhaust system with Chevy Corvettes original equipment as it came from
the factory. The aftermarket components installed on the vehicle now may be
considered emissions tampers if they are not California certified, and do
not posses EO numbers (executive order). As far as the smog pump... if it
wasn't equipped with an air pump from the factory then no smog pump will be
required to pass the California smog check.
There is a difference with California legal and Federal legal emission
requirements. A used vehicle which has all the Federal required emission
components, can pass the California smog inspection process and be legally
registered in this state. It is true that California cars have different,
and in some cases more, emission components then Federal cars, but this does
not mean that these cars can't be registered in California. A vehicle which
is equipped with the necessary Federal Emission Components is eligible for
California registration as long as the vehicle's exhaust emissions fall
within California's limits.