On the lower half of the driver side of the block. It sticks out of the engine about 1" and has a downspout about 1/2" with a hex bolt on the end.

 

.A better way.

Pull the lower radiator hose & plug the radiator with a kids rubber ball.
Add water with a garden hose at the radiator cap.
Run water till clear.
Remove ball & flush radiator by putting the ball in the lower hose.

This will also test radiator flow. A clean radiator will take all the water you can get from a garden hose. If not clean the radiator.

You are probably flushing because the car heats. Check the radiator flow

 

Great!!! Thanks, I appreciate it, and hope all turns out well tomorrow.

Thanks again,
Brad

 

replace the drain plug in the radiator when you do this . i had one seperate two years after the plug was put in for no good reason. my wife was driving the car when it happened and before she stopped it cost me a new motor due to overheating.no waterleft in the cooling system.