Mostly old school..!
I've got an interesting problem that I've been dealing with for about a year or so. "99 TJ" Every once in a while (maybe 10% of the time) when applying the brakes, they want to pull to the left. This is a whole lot more noticeable when stopping fast. A year ago I relaced both front rotors, and pads on the front, and wheel cylinders, shoes, and new drums on the back. Although the brakes worked fine after that, I still had the same issue with pulling every now and then. I also replaced front brake lines last year, and just recently replaced both front calipers. Still the same issue. About the only other thing I can think of is flushing the lines completely. Any other suggestions?