crooked streering wheel pulling to the Right.

[MoparLeo]

A consideration i did not see anyone mention is that you need to have a "thrust angle" alignment done to get it done properly.
Sometimes the rear axle is not perfectly centered with the centerline of the chassis. If this is the case, it will be impossible to get the wheel centered when the car is rolling down the road.
Most people have seen a car or truck going down the hi-way in what is called " crabbing". In other words it looks like the car is going slightly "sideways" down the road. This normally indicates that the vehicle has been in an accident or had the rear axle replaced without making sure it was 90° to the centerline of the car.
Go to a reputable alignment shop, have a proper suspension inspection for loose/damaged parts. Get a print out of what the thrust angle of the car is.

 

[AR67GTX]

I didn’t catch on your original post that you are in France which probably limits your choice of mechanics for an old US car. If you think the alignment was properly done (except he didn’t center the wheel) and tracks straight on a straight road, then you can probably tackle this yourself if you keep careful track of each adjustment.

Note that the steering linkage is behind the wheel centerline as you need to understand if you need to shorten or lengthen the tie rod assembly on both sides to move the wheels in the direction you need to move them.

You will be lengthening the assembly on one side and shorten it an equal amount on the other.

If the steering wheel needs to be moved clockwise when traveling in a straight line, then the right side has to be lengthened and the left side shortened. If the wheel needs to go CCW then the opposite adjustments need to be made.

Turning the sleeve on the tie rod assembly shortens and lengthens the assembly depending on the direction it’s turned in. The tie rod ends are threaded in opposite directions so turning the sleeve moves both in or out at the same time.

Mark the sleeves so you know exactly how much you are turning it so you can duplicate it in the opposite direction on the other side.

it will probably take a couple adjustments followed by test drives to get it where you want it.

it would still be easier to take it back to the guy who did the alignment.

 

[MoparLeo]

If the steering wheel is installed properly on the shaft have someone hold the steering wheel straight and then make your adjustments. Verify with a simple tape measure used on the tire treads.