Here in Ca you have to swap everything over from the donor rig, i.e all of the smog equipment/exhaust, sensors, ecu, etc. must be swapped over, then it must be inspected/certified by a C.A.R.B. referee before any smog shop can test it.

Here is another fun <img src="/forums/images/graemlins/zombie.gif" alt="" /> bit of info for those here in CA, according to my smog tech as of Nov. 1st of this year all pre-OBII vehicles will now also have to have a fuel tank pressurization/leak test. The test will be pumping the system full of hydrogen (IIRC) and see if you have a leak, if it leaks you fail the smog test. From what I understand it is to test the charcoal canister and return fuel lines.