Anyone used a summit or Jegs rear disc brake kit

Hey all.
getting ready to upgrade the front drum brakes on my 67 Barracuda to 73+ factory front disk brakes. Rear is 8 3/4 with large bolt pattern axles and green bearings already. I see both Summit and Jegs offer rear disc conversions for 8 3/4. Has anyone used either of these? My big questions are what master cylinder to use and what distribution block would be appropriate for 4 wheel discs? Also not sure if it matters but car has manual brakes and will remain manual after swap.
Thanks for your help