M C rod??

Here is the short way;If you have old,hard flex hoses dont use this method.If you use this method,be forewarned; I accept no responsibility for failed hoses;not today and not ever.
You will need to clamp the lines.This requires a special clamp. One where the edges of the vices cannot unduly dig into or cut the hose sheaths. Then you simply clamp a line, and pedal test.I usually start at the back, because one clamp eliminates both rear brakes.If clamping the rear, very significantly reduces the pedal travel,go there and adjust the starwheels out to the drums,remove the clamp, and retest.Still got huge travel? Re-clamp it,and move to the front. Go to the passenger/right side and clamp that line, and pedal test.Problem solved? Go back and adjust that starwheel, pushing the shoes out,until you get a heavy drag,and pedaltest.Continue in this way.
Once the pedal gets hard,remove all the clamps and retest.
And finally re-adjust the starwheels, and double check that the clamps are all off.