Since you already have it on the car, try bleeding it from there - nothing to lose.
You could fill it with fluid, disconnect the line from it and you or someone very slowly work the pedal in and out. Watch for bubbles coming up in the supply. Tap on the side with a rubber mallet now and then to dislodge air pockets. At some point you ought to be pushing fluid out the front opening at which point you're on the road to success. Make sure and put rags under it and wash the area afterwards as the DOT 3 will attack paint on you.