Disc brake rears do not HAVE C-clips or require C-clips eliminators..check out the Eaton unit and give Drive Train Direct a call they offer lots of package deals and I am sure they can help you.
www.drivetraindirect.com
1-866-491-1954 or 1-909-272-0158 they are located in California.
they have a 31 spline Eaton kit for a regular drum wheel for $549 Superior axles, carrier, bearings, seals, studs and fluid.
Stay away from Excessice Motorsports...just friendly advise, do a search on them, their BBB ratings sucks as well.