Here is my advice on this car and what to do to it.
Unless you have a good amount of money... apx $10,000 to sink into it. Forget trying to make it fast or make tons of power.
Instead go with a good gear, 3.73 3.90 or 4.10, Get a tune. leave it.
If you are going to auto cross it, do full suspension then stop.
Trust me.