On my 70, I had used the spindles from a 77 Granada, along with the discs, calipers and brake hoses. The tie rods went right into the Granada spindles with no problem. I like the Granada spindle better since it is quite beefier. My system is still manual, I had used the Granada master cylinder that has the two different sized reservoirs---the bigger is for the calipers in front. I had to switch my lines since the original Cougar"s reservoirs were in opposite positions. I did not change my proportioning valve. In fact, this Cougar stops the best out of the 3 that I have driving. If I ever do lock 'em up---they all lock up. My other two Cougars were both factory disc and have excessive pressure to the rear--causing the rear to lock-up and make the car spin around.
The Granada discs are cheaper--about 1/2 of Cougar discs, and usually in stock at the local parts store.
I also used Granada discs on my 69 that originally had power disc from the factory. I just changed the outer bearing and they fit using the Cougar calipers---they have been on there for 4 years with no problems.
Mark Piechowski
70 XR-7 460 AOD
69 SS 351c 2v AOD
70 XR-7 conv 351c 4v FMX
69 Sunroof Eliminator 351w 4v FMX