29. Booster and master cylinder installation calls for attention to detail. First, connect the pedal, brake light switch, and push-rod under the dash using new bushings. Put a dab of white grease on the power booster push-rod tip and seat the master cylinder. Adjust the rod tip in or out so it “just touches” the master cylinder piston, which will be visible in the grease. If there is any master cylinder piston depression, the brakes will not release. If there’s too much depression, fluid can’t get into the bore, making it impossible to bleed the brakes. By the same token, you don’t want a gap between the power booster rod tip and master cylinder piston, which will cause too much pedal travel.