I feel inclined to say no on that one. Im not 100% positive that they wont work, but its better than saying they will when they wont. If you call up an auto parts store, get the part numbers for the brake parts you want to use, for both the
Stang and the Granada. This may prove to be tedious because most stores dont have computer reference under 1969-1970, so find someone good with the book look-up. You can also try calling a tech at the ford dealership. I can see if Ford wanted to save money by using the same brakes, but the fitting of, and capability of the brakes is something to check on.