For many years, I ran the factory front disc brakes on my Fairmont, with 67 T Bird 11" rear drum brakes. The stock rotors were 10", and back when the car only trapped 125-126 MPH, never really had any abnormal brake issues. Plus my home track has a long shutdown area. However, going 5 MPH faster made the brake life drop dramatically, and going to a couple of races a year at Bremerton Raceway, with a much shorter, plus downhill shut down, really killed the rotors. I have solid Centerline AutoDrag Wheels, so you can not see the rotors from outside, but several years ago, I was shocked at how bad the rotors looked. They were blue, with large cracks all around the rotor, and on both sides. Thay looked so bad, that they looked like if you dropped them on the floor, they would shatter into pieces. (I did try that, they did NOT break.) After putting on new rotors a few times, about 3 years ago, I upgraded to the 11" brake spindles and calipers from a 5.0 L 87-93 Mustang, along with 5 lug rotors. I can`t say the car stop a lot better, but at least the larger rotors look much better.