HOWE tall ball joint question

[BigBlockOlds]

I went to torque down my ball joints and found that when torqued to the factory specs, the nut is too far down on the stud. Being that far down, if I put a cotter pin through the stud, its no where close to the nut, thus there's no way its going to be able to keep it from back off.

Has anyone else ran into a situation like this? I've had people tell me that you can use a thick washer under the nut to get it back where you need it but that seems a bit shady. The last thing I want to do is compromise a critical suspension part.

Thanks guys,