GM Cutlass RWD 1970-1987 Repair Guide
Vacuum Power Booster
REMOVAL & INSTALLATION
Disconnect the negative battery cable. Disconnect the booster pushrod from the brake pedal arm by removing the retaining clip, and sliding the eyelet end of the pushrod off of the pin on the brake arm.
Disconnect the master cylinder from the booster.
Remove the attaching nuts and remove the booster from the firewall.
Install the booster on the fire wall and torque the booster-to-firewall nuts to 23-33 ft. lbs. (29-45 Nm).Reconnect the the pushrod at the brake arm
Install the master cylinder and bleed the system.