there was no factory 5.13's, the lowest factory chevy used was 4.56's. however you can go as low as 5.38's with the 14 bolt.
C&C and SRW housings are the same except for the hubs and the factory brake backing plates for the brake drums. other than that they are the same. they even use the same inner shafts.
i belive on JU i posted a link to some of your questions, if it was you?
there was several versions of a 14 bolt even the light duty version semi float in 6 and 8 lug. if you have hubs you have a FF witch is the better axle's to have. this way the extra weight is on the hub and spindle not the axle shaft, they only have to spin the hub witch in turns spin the tire's.
1993 YJ 4.0 60 Front, Rear steer 60, bolth spooled, 5.38's, 700r/241 39.5 iroks and beating it like it owes me money.