Just picked up a complete brake swap from a friend. Everything is included except for the prop valve (he even threw in a powerslot big brake upgrade for the fronts too). I have installed everything on the front (spindle, calipers, rotors, big brake kit, pads) except for the prop valve and mc/bb. The mc off his si is a 7/8 as is the one off my ex, so i didn't change it out. Due to certain circumstances, I need to get the car back on the road, so the rear disc swap is going to have to wait. My problem is that I have no pedal pressure and no brake power at all. I've been through the entire system: no leaks, no air, and still no brakes. I've bench bled the master cylinder and the lines several times now. Any ideas as to what the problem could be?