Amervo, yes I`m well aware of the a**holes, I used to run my dads dealership (83-90) and we had a DPS trooper whom I called "Mr Smiles" ( because he never cracked one!)that came regularly to our shop, issued stickers ,etc....
but the last 7 yrs I have taken my (over those yrs,3 classics)cars to 3 different inspection stations, never heard any complaint....maybe I`m lucky? But I always hear from them that 25 and older cars are excempt from 'emissions' tests....therefor we only pay the $12.50 , rather than the $45.00 (which now is in effect in Harris county also, I think they only check wipers, lights ,brakes, make sure you have a windshield, I`m not even sure they check turnsignals , since in those days 'handsignals' were allowed---
Houston is mostly in Harris county, but other neighboring counties are involved too)
none of my cars have had 'snorkels' , all have had K&N type filters w the round flat air cleaner, open all around....

Maybe they just dont know? but as long as my car passes ( and I guess Ill go back to same insp. station , then I`ll have 'precedent' of 2,3 yrs?), I will keep it that way...if for some reason it wouldnt pass, I guess I`d go to a junk yard , get one for inspections only....just like Jeff needs to do...