A couple of comments on this thread...
Originally Posted by vital49
The rear brakes automatically adjust when you drive in reverse. What other adjustment can you do?
Check that the self-adjusting mechanism is lubed and free to move. In particular, those with star-wheel adjusters can have two points of lubrication needed, not just one: The threads, of course, so the thing can unscrew and expand freely as it needs to, but also the end cap opposite the threaded end, which allows the main star wheel to turn. I remember an adjuster on an old Caprice that looked fine but would'nt budge, until I realized that the end cap needed to turn, but couldn't, and was frozen on the star-wheel shaft. The threads had been generously lubed over the years, but apparently nobody had ever noticed the end cap.
As for torquing the lug nuts, this is critical, especially on the front rotors as they are indeed prone to warping otherwise. Even if yours are already warped, re-torque them by hand to the proper setting and you may get a noticeable reduction in pulsing. The torque setting for my '93 is 100 lbs./ft. Torque the nuts in a star pattern to 80 lbs./ft., then 90 lbs./ft., then 100 lbs./ft.
One drop of oil should be put on the threads to provide an accurate torque reading; they should not be assembled dry. The torque reading is intended to show the correct tension of the lug stretching as the nut is tightened; it does not (or should not) come primarily from the friction of the threads meshing as it'* screwed on.
If the nut binds on the lug threads, you'll get a false torque reading and the lugs will be unevenly tightened, causing warping when the rotor heats up. Per the service manual: "All fasteners and threaded holes should be clean and lightly lubricated with oil unless noted otherwise. Dry or dirty threads produce friction which prevents accurate torque measurements."