If fluid is coming out the rear bleeders then its making it to the wheel cylinders so something is 'jammed up.
Couple of things to check, first, are the rubber lines to the wheel cylinders new ? They can "hourglass" internally and hold pressure on the brake shoes so they stay expanded and won't move farther...,,even though fluid may move one way to the bleeders under pressure.
If there are self adjusters did you get each one on the proper side, they are NOT interchangeable and usually marked "L" and "R" somewhere, did you get the leading and trailing shoes on the correct sides of each brake hub....did you lube the
part of the backing plate where the shoes 'slide... Are all the springs/parking brake
parts on properly ?? If there is a proportioning valve did you adjust it properly ? Is it a dual MC conversion ?
Post some pictures of the rear brake ass'y with the drum off if you know how.
You can put the drum 1/2 way or a little more onto the shoes and have someone push the brake pedal to see if the shoes expand and move like they should as a test. And yes, you should run the adjusters out until the drum drags when turned and then back off several 'clicks'.