Long Travel Soft Brake Pedal

FWIW, when I did a Wilwood front disc conversion on my '70 Dart, I had a spongy pedal after several sessions of bleeding. A mechanic buddy saw my frustration and told me to bleed the rear brakes, first, then, do the front. That was it. Now, I have a high and hard pedal and the line lock holds just fine. Who knew??