I have a cosworth with modded pedal box that runs a bias bar setup, Ive bled the front just fine but the rear brakes ive had to do several times and in every way I can think of and i still cant get rear brake and Hand brake, is the pressure bleeder the only way to do it successfully? I have changed master cyl so they are new but still no brakes, and the new 5.1 fludi has turned black over night? any ideas?

I will eventually change my pedal box as this setup is doing my head in!! PICS ARE AVAILABLE ON MY PROJECT PAGE