Ah, sorry, just noticed that your post was directed at me!
Anywho, yeah, we have emissions here too. It's included in the safety inspecion. My dad's old '73 GMC truck failed one year because of a part in his exhaust went bad. In fact, he ended up just selling the truck because the part had become nearly and antique and would cost over $100 + shipping, which is about what the truck was worth!
But, yeah, you'll need to keep those cat guts in, sorry. You could move to South Carolina, I guess, they no longer have inspections of any kind.