John, the dualcab goes in with cat convertors on test days. I'll usually run those daily, or a racier system on show days. The engine is EFI , with all OE emissions attached and passes the tests. There are just some smog techs to go to , and others not to . Most techs just test it as an MPPV-Multi Purpose Passenger Van, which is what the OE door jamb sticker says anyway.
Joe, Registration should be no problem, first off : all North American 2cabs come with the factory MPPV sticker on the door post, usually Canadian DOT . They also come with emissions stickers on the engine lid. In Cali, a Canadian car being registered is simply done as an out-of-state transaction, just bring a clean bill of sale, title, smog check , proof of ins., certified weight cert. and some $$. The weight cert is critical ($5.00 at a truck stop), as the DMV examiner says it's a truck--so without the cert, the registration is incomplete.
BTW, syncros are much heavier than 2WDs, but they don't budge in crosswinds--I miss mine
Marty