Brakes pulling to left

My friend has a '72 Dart, 4-dorr, 225, auto. When he first got the car we did a brake system rebuild with all new wheel cylinders, rubber lines, and steel lines where necessary. Everything worked well at first but after a while it started pulling to the left. We readjusted the front brakes which helped but it didn't last and has progressively gotten worse. One of the original lines we didn't replace finally gave out so today we did a complete rebuild of the steel lines. And of course it still pulls to the left. So we pulled the drums to make sure everything was hooked up right which it was. There was one thing I noticed though. The cable for the self adjusting brakes was slightly loose on the right side which left the adjuster sitting below star wheel, not toughing it. It's tight and touching the star wheel on the left side. Could the fact that the slack cable on the right is not adjusting the wheel, but is on the left and causing that side to grab first and pull to the left, or could there be something else going on that we can't see. thanks in advance.