rear disk brake set up

 I have a 1991 chev 1/2 ton extened cab and would like to install rear disk brakes what have you guys used or done for a set up like this .

http://www.speedwaymotors.com/GM-Complete-Rear-Disc-Kits,2000.html

http://www.ssbrakes.com/

ouch. SSBC for $999.00. That's kind of crazy considering they both do the same job. Rear brakes don't even do that much to need that much money in a rear brake setup.

I was just throwing it out there.  But you are right though.