I just wanted to put my two cents in here.
I'm not sure what the state inspections are like in GA, but here in Mass the system is pretty unfoolable. If your model car is not OBD II equipped from factory then the inspection machine will know it. Its not a matter of choice from the inspectors point of view, they merely do what the inspection machine tells them to do. OBD II was introduced in '96 model year cars so anything prior to '96 gets tailpipe emissions checked. (here in Mass its every other year for emissions testing) So pretty much no matter what ECU you put in, the inspection machine doesnt ask you to hook up the OBD II connector since the car isnt equipped with one. (according to its database)

Hope this sheds some light on the process. I am willing to bet that most states have a similar system if not identical for emmissions testing.

Shoofly
Acura Mechanic