Need to identify a particular K-member and Pitman

You have a 73-76 A-body K-frame.

You have a 68-72 A-body manual steering gear, pitman arm, idler arm and centerlink setup. That setup will swap into a 73-76 k-member as a whole unit with all the parts mentioned together. The 68-72 manual steering gear pitman arm is the same part number as the 68-72 power steering arm.

I can not see a picture of the lower control arms.

If the lower control arms have a sway bar welded mount near the end of them, then it would take a 67-72 front sway bar. That is bolted to the front of the K-member and you can drill two holes in the K-member to accept that.

If the lower control arms have a sway bar mount welded in the middle of the arm then it would take a 73-76 front sway bar with the bar passing through the k-member. You will need some brackets to bolt to the two holes in your k-member for that.