If the blower was removed to install the cage the argument could be made blabla, but when the entire system including heater core is gone then the line is not so fine any longerAs a new person, I struggle with this. I bought a car that had 2011 SCCA and NASA log books, had run lots of races etc and discovered (after removing the glove box for, weight reasons, that the blower was missing. The car was overweight so no real advantage, but that is such a simple thing. I have had 2 different people work on the car and no one has noticed anything out of compliance, but then again, I am not about tear the engine down, just to make sure - at least not until I am no longer in last place.
