The SN95 struts do not require the shims nor do the V8 Fox Mustang struts. Within the Fox family of Cougars, Mustangs, and Thunderbirds if the car has 11" brakes then the spindles are the same and the struts will interchange without shims. If the car has the smaller 10" brakes then it will have the struts that will require shims when swapping to the 11" brakes or SN95 brakes.

Nothing wrong with running the TC struts except they are tuned for the 4 cylinder suspension.