The aftermarket "620" 1 inch drop springs, along with the upper control arm relocation, brings the front end down pretty good in a Cougar. Mine went down about 1-3/4" roughly.
For Granada spindles, the 99 - 04 Mustang V6 and GT aluminium PBR calipers for the 11" rotors can be bolted on with small adapters. Otherwise, you would have to make a caliper mount adapter for the Baer PBR calipers using the 3 bolt holes around the spindle stub as the mounting point. The 13" Baer kit you have probably has the same idea, except it mounts to the 4 original drum brake mounting points.
cheers
Ed N.