How do you replace master brake cylinder on 71 swinger with 318?

To replace the master brake cylinder on a 1971 Dodge Dart Swinger with a 318 engine, first, ensure the vehicle is safely lifted and supported. Begin by disconnecting the negative battery cable, then remove the brake lines from the master cylinder using a line wrench to avoid damaging them. Unbolt the master cylinder from the brake booster or firewall, and then install the new master cylinder in reverse order, ensuring all connections are secure and properly bled to remove air from the brake lines. Finally, reconnect the battery and test the brakes for proper function.