I've had a little experience with this. Its HARD as hell to get a waiver for emissions. I went thru it last time I registered my truck. After you fail the test 3 times, you have to take it to the emissions center in Murray, They will inspect the vehicle, and tell you weather it can be fixed or not. If it has to do with a carb, I'd recommend taking it to Kelly over at CarbMasters, in West Jordan. He got mine to pass.