I have to disagree. While the KH brakes work well when they are working, over time, the pistons give trouble. They can get cocked in the bores and get stuck. Chrysler knew they were troublesome. That's why they went to a single piston setup. Nine times out of ten, if you jump to something newer, it's also better. Yup, you can make the K/H brakes work great. I've had them myself. I have a set of FMJ police brakes I plan on putting on my 63 now. No way in the world would I look for some 40 plus year old designs to stop my car with now.