Well maybe, maybe not.
As has been stated about the incorrect geometry of the Granada spindles, the incorrect tie rod ends, the bigger hub centers that don't fit the stock wheels, the smaller rotors, etc --all may not be bad.
If one can go to a local yard find a Granada brake setup that has excellent rotors, calipers, pads, buy this for say $175.00, then spend the time money, extra money to fit it on their economy based Mustang, then maybe you did fine.
If, you have to buy this same Granada setup for $175.00, buy new Rotors, Bearings, Calipers, shields, then add on all the have to components to make them Maybe work, then it become apparent the cost to put on a brake setup that isn't correct, it possibly a mistake.
If your present spindles are V8 spindles, it is Very apparent to folks like us that changing these perfect Factory spindles for a Granada set is the wrong method.
Bolt on the K/H 4 Piston setup cruise, have a excellent driving, FACTORY disc brake setup.
If you have a 6 cylinder, want disc brakes, building a economy based Mustang, then a Granada setup maybe the way to go.
Dan @ Chockostang