How do you replace rear brake cylinder on a 1976 Datsun 280Z?

To replace the rear brake cylinder on a 1976 Datsun 280Z, first, lift the rear of the car and remove the wheel. Then, detach the brake drum and locate the brake cylinder, disconnecting the brake line and any mounting bolts. Install the new cylinder by reversing the disassembly process, ensuring all connections are secure and bleed the brake system to remove any air. Finally, reassemble the drum and wheel, and lower the car.