69 dart disk brake swap

20yrs ago I got my 69 dart I got what I believe is disk brakes off a 76 volare or similar they are a single piston caliper. I'm tryn to get it going after all these yrs. Bought a disk brake master 20 yrs ago it's been dry the whole time. have my brass drum drum distribution block. all new calipers rear wheel cylinders lines rubber hoses and pads have bled every thing and still have no pedal the rears barely move after pumping a couple times. Fluid squirts out good from all bleeders front and rear. Even with the drum distribution block shouldn't I get some brakes? This is my master cylinder

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