I know with a stock or mildly stock 03/04 Cobra wheel hop will kill those axles if you're drag racing. If you're doing it to go around a track then you'd be off to a good start with that stock IRS setup. You could consider looking into a 8.8 Ford solid axle swap to save some weight from the IRS Check out the Boss or Shelby going around a track. You can get them to handle pretty damn well