I quoted the whole thing and it got deleted
Why would you exempt a critical modification that allows him to get lower ETs? That's like exempting the tires or exempting the supercharger. It's a modification that gets lower ETs. Simple as that.
He could have had Ford modify the trans so he could drive it, but instead he bought a racing transmission with a trans brake and modified it. Go on Coans website and look at what they offer.