No rear brakes after 4 wheel disc swap?

Justin, I am installing a new Ford 9 inch rear end from PEM racing in Missouri. They use a GM metric disc brake system on their "Hot Rod '' rear end they sell and YES the E brake has to be up and running and in place which is what Tool man was referring to.
Nothing else on my 72 Duster project has got baffled but my Manual brake system. I feel your pain brother. Some Great info has been brought forth by tried and proven methods. Gary