ceramics handle heat better and create less dust but wear out faster - semis should be fine a littl moly lube between the caliper and pads to stop noise...

if memory serves me - rotors are dependant on wheel size not stud size.
issue jeep brakes are famous for wearing a groove in the knuckle causing the inboard pad to get stuck - a shop can weld in a repair and smooth it out rather than replace the knuckles... (replace with steel rotors btw)

 

good tip... caliper slides are free (move with finger pressure) so that's good - I will pay attention to the knuckle/pad interface when I get it apart again. I always just use anti-sleaze in place of the pad loob and it seems to work out OK... heck my old brakes don't have anything on them and they're quiet *shrug* I also knock a chamfer into the leading edge of the pads if there isn't one out of the box, that seems to do more than anything else to keep them quiet