I have been having a braking issue since i bought this car.(1978 XR7 Cougar) The driver side squeaked horribly. I just pulled the tire off today and to my amazement i discovered that the car in fact hasnt had a pad on the car within the last 3-5,000 miles at my estimate. The rotor is completely worn out. So bad in fact there holes going through the front surface and its scored. Im replacing the rotor and getting new pads. The passenger side is perfectly fine. Very little wear and the rotor is perfect. So my question is this. Should i replace the caliper when i do the brakes? or should i just replace the pads? And does anyone have any pointers about replacing the brakes? Its my first time doing them myself. Thanks!