I just heard back from my local California Smog Referee today! This is what he said:
JDM MOTORS CAN BE LEGAL AS LONG AS:

1. The engine is the same year as car or newer.


2. The ECU is a USDM and not JDM.

3. NO JDM wiring harness, it must be USDM.


4. The intake must be the original USDM air box, OR an intake that has a C.A.R.B sticker that is STRICTLY for the swapped motor. (Example: an AEM CAI for a GSR with a GSR motor will PASS, a AEM CAI for a Type R with a GSR motor will NOT pass)
I used an Injen intake, they listed it on my BAR sticker

5. The exhaust manifold MUST BE USDM, and if it is not O.E. then it must have a C.A.R.B sticker that matches the motor. I asked the ref. if they could really tell the difference between a stock USDM and JDM exhaust manifold, and he said that they have pictures for everything, and there are slight differences.
I used a DC 4-1 with carb #, also listed on my sticker

6. No adjustable FPR's, not unless it has a C.A.R.B. sticker. Does anyone know if the AEM FPR is C.A.R.B legal?
adj FPR are not CARB exempt

7. Must have a catalytic converter hooked up (this one is pretty obvious).

8. All USDM O.E. smog equipment MUST be hooked up and working properly!
including your check engine light, has to work properly

*YOU ONLY GET TO VISIT THE SMOG REF. TWO TIMES TO TRY AND HAVE THE SWAPPED MOTOR PASS; AFTER THE SECOND TIME, IF IT DOESN'T PASS, I GUESS YOU ARE SHIT OUT OF LUCK*

I've never known anyone that couldn't pass the second time, as they give you a list of what is holding you back

THE BIG QUESTION THAT I FORGOT TO ASK:

By getting the C.A.R.B sticker, will my insurance find out about the swapped motor?
I've had my motor in for about 2 years, insurance was not affected