What brake pads to use for Kelsey-Hayes setup?

Update - over the weekend I installed the EBC "green stuff" pads. Wow, what a difference! They really grab and it's really noticeable. I simply changed the pads, didn't do a thing with the rotors. Now that said, the car stopped a lot faster but the rears continued to lock up on a hard stop. I took off the rear drums & shoes and noticed the shoes were wearing only near the ends so I decided to taper the ends with a mini belt sander. Anyhow, the short story is they no longer lock up, the car stops better than it ever has and it now feels safe to drive.