A few years back, I bought a bleeder tool that is a syringe with a tapered rubber piece over the end where a needle would go if it was for giving shots. The way you use it is simple. You dip the rubber piece into a reservoir that' full of brake fluid, tip it up, slightly depress the plunger to get rid of the air, then you hold the rubber piece on the place where the brake line screws onto the master cylinder, and push the brake fluid through the port backwards. When you don't see any more air bubbles, move to the second side. When you're not getting any more air out, install the master cylinder, top off the brake fluid, and drive off. I was having master cylinder problems with both of my trucks and I got to the point that I could do the entire swap and bleeding in about 20 minutes or less with hand tools.