Think of the solid rear axle as a solid I beam. No castor, camber or toe in ajustments. Things you can do to a 4 link solid rear axle in a Mustang all have to do with the control arms and how they are set up (some uppers will even let you ajust the pinion angle of the rear). Some control arms can even be set for the amount of "bite" you want. A friend had his 95 Cobra set up with so much hook that you couldn't physically make it break the tires loose from a redline clutch drop. You can also convert it to a 3 link style which permits a bit more roll, but the hot setup is a 5 link with a panhard bar/ect... Rear springs/shocks are crutial to the setup as well.

The main issue with the steering angle on a Fox is that there is never enough of it. They have the turning radius of an Australian "Road Train." Simple stuff can be done, but not much as far as any steering angle. Castor/camber is pretty limited unless you get real serious, but toe in/out is always a few turns away.

The hardest part I always had with drifting (before it was called that) a Fox was the snap oversteer they will always do. They're pretty twitchy and always have too much torque down low. Fun for donuts though.

2JZ + Fox = 2800 lb Supra that can dead hook.