The dropmemebr will use either 63-72 style arms/sindles or the 73-87 style (they all bolt up the same, 63-72 use a different ball joint than 73-87). It was designed to use Air Ride Tech.'s Strong Arms, but will work with stock or other aftermarket tube arms with some mods to the arms. (I was supposed to post up a pic of a stock lower arm and wher it needs to be trimmed, wasn't I... tomorrow hopefully
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Whatever brake package you go with, just make sure the arms you get/have will work with the spindles you get.