I honestly think it's not worth holding onto a carb just for factory originalities' sake. This is one of those moments where owning an old vehicle can grief you from lack of parts (especially brake parts for a Gen 1 - rear brake shoes and front rotors are not easy to get...) The federal emissions carb will bolt up and function in an identical fashion to the Cali choker. I have a feeling a fed will be easier to fully strip down as IIRC some of the screws holding the Cali together are tamper proof - meaning they have to either be drilled out or ground off to work on it. You may inadvertedly find some power too by changing the carb...