55.2-59 Keeping Pedal pressure with under-cab MC

[_Ogre]

i run a disk/disk 03 mustang hydroboost under floor and cut off 3" of the pedal
initially the brakes were bled with the cab off and 1.5" down was locked
this worked fine for the first 8 years, until i had a brake issue
replaced the mc this spring and couldn't get the brakes to bleed
ended up replacing rear calipers and going from oem mustang differential valve to single line
nothing really helped until it dawned on me that i had cut the pedal
removed pedal and bled from below pulling on the pedal arm
it worked, i have 90% pedal that i originally had, still a little more stroke but brakes work great
i believe there was some air in the mc from not bleeding with full stroke