OK, lets back waaaaay up. What is the history of this truck, specifically the rear axle and all of the parts associated with the brakes?
What did you throw out and replace?
For the geometry to be so far off for the wheel cylinder adjusters to be turned out so far to make contact with the drum, I have to wonder about the correctness of the parts attached to the bottom pivot pin, or the location of the holes in the backing plate for the two bolts down there.