Disc brake Caliper pins/bolts sizes????? Where to buy???

Post a pic of your brakes so we know what we are dealing with. MaMopar only had one pin slider brake set up, GM + Ferd had bunches of them. I'm wondering if you may have a conversion kit that uses GM calipers. '73 up disc brakes used slider calipers and didn't even have the pins you are looking for. Need more info.....