[Jamo]

Yup, and nope...you won't find it on the DMV page. If the 500 are gone, you will be registered for the current year, and your smog requirements will depend on the year of your engine.

Course, you can always go back and use SB 1578 and change it if you get one of the 500 in the next year.

Thus, pick the right motor, make sure you have the necessary smog equipment (even 1955 and newer required PCVs), pass the smog check initially and every two years thereafter...unless and until you get one of the 500 numbers in any year and swap it over...and you'll be just fine.