The MAF clamp is untested. I don't have a problem with it, but if used for forced induction, it has to be faked with a voltage to prevent throwing a CEL. It is basically the biggest part of "faking out" the computer, and therefore it will be the biggest issue for boosting the car.

Yes, you will have to cut and solder the harness. But on the Crossfire, the harness is very easy to modify.