JEGS 555-631965 Power Brake Unit Features:

• Fits 1973-1987 Chevy & GMC Trucks
• Front Disc and Rear Drum Applications
• Chrome Plated Aluminum 1 1/8 in. Bore Dual Reservoir Master Cylinder with Oval Cap
• Chrome Plated 8 in. Dual Diaphragm Power Booster
• Power Booster Vacuum Port Connector
• Black Powder Coated Firewall Mounting Brackets
• Truck Pedal Rod Extension
• Chrome Bottom Mount Proportioning Valve Kit
• Brake Warning Light Switch & Connector
Pre-Bent Brake Lines & Bracket
• (2) 3/8 in.-24 & (1) 9/16 in.-20 fitting needed to install valve

Note:

This master cylinder features a small equalization opening in the reservoir divider as part of its intended design. The opening allows both reservoir chambers to be filled from one side and helps the brake fluid level equalize when the reservoir is adequately filled. Because the opening is positioned above the bottom of the divider, each chamber can still retain a separate supply of brake fluid if the fluid level drops due to a loss in one hydraulic circuit.