Some are rather presumptuous in their thinking and commenting.
No one "hired me." No one paid Breedlove, or Penske, or Alex Xydias. Understand that most EVERY interview is done free-of-charge. We were all happy to help the bigger storyline and will get a copy of the show as "payment." We have NO IDEA what Hennessy's arrangement was, if you are curious, go ask him.
"Street legal" is straight-forward in transportation, but to help those struggling, it means capable of being licensed, registered and driven on the public roads. As for the term "production" car, that definition has ebbed and flowed throughout the automotive world for decades and will doubtless continue to do so.
As for OBD emission cut points, that also radically changes with the geographic location of "non-attainment" areas. There are places in the USA where no emission tests are required and others where the NoX, CO and Hydrocarbons are barely tolerated. Further, you can legally change the tune of a emission controlled vehicle when it being operated in a racing scenario. The vehicle must be returned to compliance for public roads. Drag racers have been doing this for years although I venture to guess not all "detune" their rides for the road.