You answered your own question. [ the pedal throw ratio is 3.44.1! as per the Wilwood web site 6.1 /or more is desirable.] Your pedal ratio is close to1/2 of what it should be. I agree that a smaller master bore could help but the pedal ratio isn't giving you much leverage. As Mr P suggested it needs residual valves if the master is lower than the calipers to prevent double pump.
Doug