Also
I strongly recommend replacing the caliper pins on the front calipers. The stockers are not stainless and although you can clean them up they will just keep rusting/pitting.
Jack up the front one side at a time, thow a jackstand under there, pull off the wheel.
Then grab the cotter pin with a pair of pliers, pull (or tap out if its crusty) the old pins and slide in the new ones in their places after you have put a light coat of caliper grease on them.
Just did this myself about a week ago. I think new pins cost me $12 for all 4. I also pulled the pads and cleaned the backs and re-lubed the backs. My old pins looked like they had been at the bottom of the ocean for a few years.
Guess the previous owner never cleaned them. :bash:
Going to do a complete brake job in about 2 months so we will see how the pistons are soon enough...
FYI, I'm at 57,000 miles currently so yours may not be that bad, I'd still look them over though.