If this is just for the rear it is so easy it will make you cry.
Get 944 rear brakes from swing plate out (you need the caliper mounting bracket outward). Install on IRS arm. Done.
http://www.pelicanparts.com/944/944_...3-85/Pic69.jpg
The only issue that should arrise is how to deal with the emergency brake cables. Since I have not done a Super you have to search on that one.
FWIW you should buy a cheap POS Haynes 944 manual to get an odea of how the brake system works. They are cheap... In all ways.
It is easier than you think. Do it. Do it. Do it.