At that point, with
unlimited funds, I would rather just buy a Fiesta Global/World Rallycross car, and register it in a total non-inspection state, and then add in anything that would instantly get you pulled over by LEOs in a rallycross spec car on the street.
600+ AWHP, 2600 pounds, 1.9 second 0-60, will take ANY/ALL Hellcats up to about 130 MPH, and handle better doing it.