I've been slowing restoring my recently purchased 1991 NA and decided I would rebuild the calipers. I started sand blasting one of the rears today and got it looking pretty decent:
But on the back side I noticed something that worries me:
It appears that at some point in the past somebody installed rotors of too large of a diameter and it rubbed on the caliper, all the way through the metal and into the guide pin hole. I've checked the other rear caliper and the same thing has happened to it too, no idea about the fronts though as I haven't gotten them off of the car yet.
So what do you think? Time for some re-manufactured calipers or do you think these are still safe to use?