Doc here,

imp:
Anymore, There is no "Getting Around" smog laws , in any state that has them..
I see guy's here that post about building an engine up that is still within the smog window , or saying "How great a deal" they got on a non smogger..I always ask "what do you plan for smog if you plan on street use?" and the typical answer is: "No sweat..I CAN get around those EASY"
Six months to a year later..(when the tag runs out..) I see the same guy posting "HELP! Can't Pass Emissions!"...NOW he has a very expensive repair..OR , a 1500 pound yard gnome..
You first need to find out what Federal Standards are for your year Vehicle, minimum , and any other requirements for the state..and you must meet those requirements.
IF you have a Visual inspection, you MUST have ALL required smog parts IN place, and all the hose routing properly connected, as well as any sender/sensors and computer pickoffs..AND it must all work! If you get a check engine lamp at any time your a fail..the test computer will abort the run.
The timing must be set Exact with the standards set on the hood sticker or spec's for the car..not just "Close enough" that will buy you a failure also..
The curb idle must meet spec..+ / - 50 RPMS..(No Lopey cams!) If it goes from 600 to 700 every reveolution..The test computer will automatically abort the test..
After you get through that you must pass the "sniffer test..", it must meet the standards set forth by the Feds and state regulations..
Good luck on finding anyone to "Pay" to pass it..the fines are too steep now, ( Smallest I seen lately, is $10,000 AND 5 years in Jail,plus license revocation.) and they DO prosecute every case..PLUS trying to "beat " the test is pretty hard to do and get away with it in most states.
The states survey each area biased on the average PASS/FAIL numbers to head off fraud..both cheating the system and cheating the customer with "extra repairs" not needed..and can walk in to the shop at any time..
My suggestion to you is get whatever is needed to bring it back to Fed Standard, and make it play..
I speak from experience here, Had a restored Vette , here in California, that was a gross polluter took 13 trips to the state referee, and $6700 to make it pass! (Cali is rough on Smog) and withheld the tags until passing..AND , here at least, If you get caught on the road with it out of reg, it's an automatic 30 day impound..at like $100 a day and tow fees..and you still have to get it smogged!
Just my nickel's worth..
Doc

imp: