Extra play in steering

Over a year ago I had the engine replaced. While the car was broken down it had to be moved without power. After the car had power steering again there was a small amount of "play" in the steering. The mechanic who did the engine job said it was the u-coupling at the base of the steering column just below the floor. I've found the replacement part online and the column diagram and wondering how hard it is to replace. I have decent mechanic skills and the diagram makes it look easy. But that doesn't mean it is. Thanks