NOS K/H disc brake lower ball joints

cudamark said

On a related note, I've recently found out that there were both a standard and heavy duty torsion bar adjustment bolt and nut for the lower control arm. Do you know what the difference is and how to tell the difference between the two? Maybe a photo of each? Thanks.

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Now, where in the world did you hear that?
NEVER have i heard anything like that at all, in all these decades that i have been involved in rebuilding Mopar suspension parts, and brake systems.
Ever since 1980, when i discharged out of the Air Force.

And before the Air Force, i was an industrial machinist, and i know about Rockwell hardness test ratings for metal parts.
And i don't know what reason there would be for a hardness difference between a adjustment bolt and block, in a lower control arm.