summitt rear disk kits

I had picked up an almost complete 8.75 rear end some time ago to put under the 68 barracuda. The 8.75 is missing some of the drum brake hardware, dog bone spreader that fits under the wheel cylinder, and all the e brake activating hardware that is inside the drum.


looking at disk brakes, found these on Summitt
http://www.summitracing.com/parts/sum-bk1329-x

now under 400.00
any one use these? any good?
If replacement components are needed down the road, will they be hard to find?

I have gone through the threads where folks adapted other disk components, I just don't have the accessability for rigging and machining to pull that off.

thanks