This is a picture of what my rear disc brakes look like on my truck. I bought the kit this summer that cost over $700 and converted my rear drums to discs and gave my stainless steel brake lines and a brand new FJ-80 master cylinder. The brakes work great and stopping distance is way better.
This is what my parking brake look like now. It is attached at the rear of my transfer case and locks up the driveshafts with a disc brake. This allows for parking on very steep hills.