JB, speak to Danny or Hauser.
Either can supply you whatever you would need but as Danny has run a 8.8 diff in a Saph he will be able to give you the advice you need.
IMO its about time you tried to make your car lay down all that power, it doesn't matter how much grip a car has you can still make it go sideways by absuing the clutch and throttle, the benefit is that when you want to actually accelerate quickly you will be able too