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007, there are kits available that just really contain two plastic fittings and small plastic tubes that you can do either on the bench or on the car after it's been installed. Just move your existing lines slightly off to the side to route the small tubes back into the master cylinder reservior. It's not absolutely has to be done, it just make bleeding the brakes to each caliper go faster. I've done it either way. Bleeding C3 brakes can be tedious. I used to have my wife help me, but now I've found out I have an easier time just opening up the bleeders at each caliper and letting the fluid "gravitate" out of the calipers. You can make "small bowls" to catch the fluid out of the bottoms of say "windshield washer fluid" jugs. Put one under each caliper and open the bleeders and it will(brake fluid)will gravitate out!!! Also, tap lightly with a rubber mallet on the calipers too as this will loosen those "clinging" air bubbles inside the calipers. Take your time, this way works. :yesnod:
Did the master cylinder come with two plug like plastic bolts with small lines coming out of them? You screw these into the brake line bolt holes in the master cylinder, place the lines in the respective reserves and compress the plunger like what happens when the brakes are pressed. This bleeds the air out of the master cylinder. I belive since the maser cylnder sets at and angle when attach to the car, it allows a small pocket of air to get trapped in the front of the master cylinder so this air compresses no the fluid.