It generally does not pay to do that to an existing car, you are usually better off selling and rebuilding it right out of the box. To handle the power levels over 600HP we implement the LSD differential (mostly for the polished gear set and other enhancements done when it's built) and also the differential gets solid mounted (aluminum bushings) to keep it from moving. Other than that the cars have seen over 700HP. The power in a supercharged car comes on differently then if you were to put a Winston Cup motor in there...
For the power mixed with overall drive ability the Coyote with Supercharger is hard to argue. We are finishing one up now that will easily make 700HP, but we will likely pull it back for safety. Another one we did here:
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