Hmmm.....  I don't remember needing a torx bit to do mine ('96 V6 XLT).
Seems like a standard metric socket will suffice.  My Chilton's shows that
the '91-94 models used a single piston caliper and it looks like those used
a torx bolt, but far as I know the '95-'99 (and maybe beyond) use a standard
sized metric hex bolt.  To change the just pads (e.g. and not turn/resurface
the disc) you don't need to remove the whole caliper assembly, just the
caliper slide pin bolts, after which you can slide the caliper piston up out
of the anchor plate and off the disc. Don't let the caliper hang by the
brake hose... use a wire or piece of a coat hanger to hold it up while
you're working.

Steve