Power steering.- Can you tighten up?

I just put the steering column back in the car. The steering wheel seems to turn to much to me before the wheels start to turn.

Ok that may be the box adjustment then, or it may be something else.
Play like that can be caused by any of the parts from the steering box to the tie rod ends, and there are ways to tell.
I would start by getting under the car and having someone turn the wheel back and forth within that play and see if the shaft (sector shaft) on the bottom of the steering box moves.
If it does indeed move back and forth, you need to follow the steering linkage to find where one part moves but the rest of the linkage doesn't.
This is where your play is and the related part needs to be replaced.

If you move the steering wheel back and forth and the shaft on the bottom of the steering box does not move, then there is a real good chance the problem is in the box and might be adjusted.
You also want to make sure the box isn't moving when you turn the wheel, due to a cracked or broken mounting surface on the frame rail.

There is a nut 5/8 I think, on the top of the steering box with an allen screw down through the center of it.
This is the boxes gear lash adjustment.
The way I adjust them when needed is to hold the allen screw and loosen the nut 2-3 turns.
As the steering wheel is turned lightly back and forth within the play I tighten the allen screw just until it starts to resist.
The amount of pressure to turn the allen screw should be about the amount of pressure you can easily get it to with the tip of one finger used in a motion like stirring a cup of coffee with your finger.

It can easily be gotten tighter, but that's not usually what you want.
You want to bring the gears inside the box together but not in a bind, and that bind first shows up as a tight spot in the center of the steering (as if you were driving straight)
If you tighten it enough to feel the tight spot in the area where the steering wheel is centered, then it needs to be back off a little.
(like maybe 1/4 turn looser on the allen screw.)
Once you are satisfied with the adjustment, hold the allen screw in place and tighten the lock nut down.
Tighten it good and snug, because it will leak fluid if it isn't tight enough. (there is probably a torque spec in your manual for that)

You can do the box before or after checking the other connecting points for play in them, but checking those other parts is mandatory for questions on loose steering, or too much play in the wheel.