Where is the Oxygen Sensor located on a 1993 Ford E150 Econoline Van?

Where is the Oxygen Sensor located on a 1993 Ford E150 Econoline Van?
The o2 sensor is located on the right side of the engine compartment.
You remove the inside engine cover,and it's underneath the exhaust pipe on the right side,below the exhaust manifold.It uses a 7/8th size wrench.

The size of the o2 sensor prevents a common tool,a modified socket designed to remove and install o2 sensors,from being used.A standard wrench will work.
Be certain that the threads of the new o2 sensor have some anti-seize lubrication on them.