Need Help With Disc Brake Coversion

Is there a filter and filter retainer between the booster and master? The filter is plastic and the retainer is metal, either look in a fsm or a member might be so kind as to post a pic. Take the master off the booster and adjust the little acorn nut out about .910-.920 from base of filter where master mounts to. this controls the depth into the back of the master.