Did you bench bleed the master?
What are the calipers from front and rear?
Rears have BUILT in parking function?
Diameter and number of pistons? floating or solid mount calipers?
Are calipers single or dual side?(pistons on both sides of disc?)
thickness of discs
diameter of discs
bleeder screws top mounted?
master higher or lower than calipers?
loops in brake lines that could trap air in upper part?
leverage of pedal
proper geometry of pedal for correct amount of master cylinder travel?

better pictures!!!!!!!