Being curious, I dug out a couple of boxes out of storage. On further review the box I thought without an A, A* or AK is actually an A*. The ID was not stamped straight.
I removed it from a car with pitman arm 2350 (no steering stop lug tab) installed (left on pic below).
It's interesting AK box (right in pic below) came with a pitman arm 2355 (with steering stop lug tab) and that is original to the box.
Aaron, I would imagine you are correct with the assumption on the pitman arm if it's original. But that would be easy to find out once you start using it. I've read if you did a sharp turn on an early box with no external stop, it would cause the tires to rub on the wheel well.
