jmillheiser wrote:there is another trick. do you have family that lives outside of cali. if so then use their address and register your car in that state.
even if i were to move to cali i can still use my dads address here in wyoming and register the car in wyoming where they dont do any emissions testing and insurance rates are cheaper
Watch out!
A VERY COMMON trick is to have a "summer home" in Oregon, register your vehicles there. If CHP sees you in a daily driver with out of state plates... you're busted!

Admitted they will pay more attention to a cute blond in a Porsche Turbo... then a 10 year old "beater nissan". Only folks allowed the "out of state" plates are military...
To get around having a SR20DET engine... simple trick when I had a radical Rotary Mazda. Had to smog once a year. I would pull the engine out one night, drop the stock (low mileage) smogged engine in, smog it, swap motors back the next afternoon. No kidding. We actually had a group of folks in Sacramento, and could pull the engine in 45 minutes (after you've done it a dozen times you get fast!).
As to "engine swap"... yes, it has to be a CALIFORNIA engine. You could drop in a 300ZXtt from a later year and still be legal. Lots of older Datsun's running KA24DE engines and passing smog, no problem. Catch on the older Datsun's... the ecu will run RICH at idle to heat up the cat, well the cat is "chassis equipment" and is not required for a '72 Datsun 510. Solution is to have JWT reprogram the idle for low emissions...
Just keep your stock engine, and learn how to change it out quickly!
Tom