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Upgrading a 1978–87 GM G-Body from rear drum brakes to a CPP rear disc brake system is a great way to modernize braking performance, but proper installation and component clearance are critical.
CPP’s 7887RBP Rear Disc Conversion Kit installation guide walks through the complete conversion process, including removing the factory drum brake components and axles, installing the caliper brackets, relocating the lower shock mounts for caliper clearance, installing the rotors and calipers, connecting the brake hoses and parking brake cables, and bleeding the completed system.
The instructions also cover several important fitment details. The 12-inch rear brake setup will not fit the stock wheel, the calipers require at least 8-1/4 inches of clearance from the wheel flange toward the frame, and the system should use a four-wheel-disc proportioning valve.
Before beginning your installation, review the complete CPP instructions for proper bracket positioning, caliper alignment, brake hose routing, parking-brake adjustment, torque specifications, and final safety checks.
Installing CPP 7887RBP Rear Disc Brakes? Read the complete step-by-step installation instructions before getting started.
