The Ford disc brakes actually worked really well in all of my experiences. As long as the sliding surfaces were cleaned and lubed during regular maintenance, I never had or never saw any other problem.
I have seen other issues though. With really large tires, or really heavy loads, not usually experienced on Broncos, I have seen the ears of the caliper brackets actually spread out and leave the caliper loose.
I’ve seen that happen mostly on F250s and 350s with the dual piston calipers. Never seen it on a 150 or a bronco.
I’ll have to look back in some of my books and see if they recommended it. Pretty sure I just started doing it intuitively, but I would think that would be mentioned somewhere. I think back in the day, they considered these things to be used and serviced regularly. So maybe greasing wasn’t even expected.
Honestly, I had never heard of silicon Brake grease back in the day. All I knew was that you didn’t want the sliding surfaces to rust. Or any lubrication anywhere near the friction surfaces.
My go to was a high temp anti-seize. I only first discovered Brake grease about 25 years ago.
For the previous 25 years, it was anti-seize.