How do you replace fuel tank in a 1987 300zx?

To replace the fuel tank in a 1987 Nissan 300ZX, first, ensure the vehicle is on a flat surface and disconnect the negative battery terminal. Drain the fuel tank and remove any components connected to it, such as the fuel lines and electrical connections. Support the tank and unbolt it from its mounting points, then carefully lower it. Install the new tank by reversing the removal process, ensuring all connections are secure before reconnecting the battery and testing for leaks.