My 79 had manual brakes on when I bought it so I can't help you there. I can say that I have no adj proportion valve and it still works great. Not sure if you know this but when you bleed the brakes start from the tire farthest from the master cilinder (right rear) and work your way to the front left. Don't know if this will help any but good luck.
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79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor
93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe
Ricer hater's club member #49
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