I understand all that Jerry and I like your clever right triangle explanation, but the drag link on the AD trucks (in stock condition) wasn't level and didn't have that relationship built in to it. I've tried for decades to find one which sat parallel to the ground and I haven't found one yet. Take a look at NDKid's image there...only because the axle was lowered 4 inches (obviously moving the steering arm higher by that same amount) and because the drag link was installed upside down (losing about 1.5 inches of that raised height), does the link sit level. If his truck had the stock steering setup, the steering arm would by definition sit about 2.5 inches lower than the center point of the pitman arm.

I've saved images of other people's steering which have been posted here. Here are 2 posted some time back by Longbox55...hope he won't mind me using them for illustration. His truck is complete and sitting on tires and in this post he said it was 100% stock. If you want me to send images of my truck (which has new springs and all good steering components, I can do it, but it will show you exactly what you see in Longbox55's image...
Attachments
Drag link 1.jpg (10.74 KB, 215 downloads)
Drag link 2.jpg (9.38 KB, 212 downloads)


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end