My "magic" set-up is to run the springs stock, initially.
I set bound at 4 front and rear, rebound at 8 front and rear, Stabilizers front and rear at 4.
Then I play with the ride height.
Remember it's calibrated in mm. 25 mm= 1 inch.
So, if the rear of the car is 25 mm higher than the front, it's only an inch.
I set my LSD at 7-8, 15 and 30 (from top to bottom) on RWD cars.
Trans with final drive at 4.44.
Play with the "sports-wide" slider til you're happy with your top speed.
For oversteer, lower the rear a few clicks and test and retest until the car is how you like it.
I keep it a little soft so it grips instead of drifts. The last thing I play with is the springs.
The 'Stang can be a bit of a handful. Depending on what you are using it for Tires can also be a HUGE factor. I have run T2 and T7 tires on my Mustang at Seattle. There is a six-second difference, per lap, between them