Stock B-52 is one CSRL, the "stretch" my ex-fighter-jock prof and I pitched would take two. CSRL is only used on 2000-lb-size bombs (Mk 84, JSOW, JDAM) and ALCM, 500-pounders are loaded into conventional racks (sadly, the space-wasting low-density ones they were built with, the high-density clips made for Project Big Belly are all scrapmetal as far as I can find).
Hardcore BUFF-geek who's actually had 15 minutes of pilot-seat time in a parked -D, over here. :) (55-094, Kansas Aviation Museum in Wichita at the 50th Birthday party. Got the photo, too...)