73 E body front disc brakes conversion on A body. Where did I mess up?

Just a clarification.....
THIS is a steering knuckle:

KN 7A.JPG

The factory even clearly defines it.

nukk 1Z.jpeg

The red arrows point to the knuckle. The yellow arrow points to the spindle which is part of the knuckle.

KN 9.JPG

The term "dropped spindle" referred to the actual spindle being placed up higher on the knuckle (Closer to the upper ball joint) to effectively lower the vehicle, all else being equal.