revloc/ clutch master as rear brake

Here the thing, revloc make one but it cable operated and it pushes on the rear brake master,cost is around 140.00. Here's my throught , use the clutch master as the rear brake master. How you ask,run a russel/earl line right to the the rear caliper from the clutch master this should work. Here is what I am looking for ,is the clutch master strong enough!!!!Thanks for any information.