It's actually a pretty easy process. The key is communication between the person pumpng the pedal and the one opening the bleeder. I would suggest having both windows open so that you can hear each other clearly. Ok, on to the actual process. Have the person inside gently pump the pedal until it feels firm. i usualy have the persom pumping go 5 strikes of the pedal, then have them hold pressure. make sure to have them tell you when they are ready by telling you "up" or "ready". Make sure they don't pump the pedal too fast, as this can cavitate the fluid, drawing in even more air. Once the helper lets you know it's pumped up, open the bleeder, while watching the stream for air bubbles. Have the helper say "down" when the pedal reaches the end of the stroke, the close the bleeder. Repeat until there are no air bubble present and the stream is clear. Make sure to check the MC so it doesn't go dry, or you will have to start over. Repeat on the other wheels folowing the pattern shown in the manual, or go from the longest line to the shortest, which would be LR-RR-RF-LF on a '58 due to the brake line layout.
One more thing you should do that will help with the low pedal issue is readjust the brakes. That will bring the pedal up quite a bit.
