you can also just use brake line and fittings and plumb them up and back into the master cylinder bowls. keep the fluid level up, leaving about 1/4" from the lip. press in with a #3 phillips screwdriver in the pushrod hole. it will go in pretty far, but will eventually get to the point of being hard to push in. at that point it will only go in about 1/8-1/4" and you will see only a stream come out of the bowls and no more air bubbles.
