Roush wheel alignment specs

The proper specs depend on the car and the usage of it.
A good alignment shop will know what is best for handling or tire wear.

Also, maximum caster is the best for the car not following the ruts in the road.
 
The Saleen Mustang Special Instructions and Specifications sheet that was included with my 93 says

Alignment
Camber - negative 1 degree (per wheel)
Caster - Stock (non-adjustable)
Toe - 0-1/16" total toe in

Hope this helps.
 
Since the SN95 cars have different lower control arms and ball joints, I would assume that the alignment specs are probably a little different. Just an educated guess though.