Derek, You could have your heads and exhaust manifolds "Plasma" port polished, And your heads and manifolds port matched? There is somebody who will even take your stock exhaust manifolds and "slice" them in half and hog em out and re-weld them back to look stock. Or did you get headers for your car? I can't remember.
These are all "tricks" some of the more serious "Pure Stock" drag racers use to pull some extra HP out of their "stock" engines.
How about changing the Cams?
Since you are about the only one who is running a Crossfire at the races, are you doing so well that NASA feels that they have to reclassify your car because you have an "unfair" advantage? Can't they tell it's because of the driver?