Thats the trick no one has figured out yet. You can hunt for a shorter or longer pitman arm, which raises or lowers the back of the drag link, or you can bend the steering arm at the axle end of the drag link. If yours is like mine, the drag link barely clears the top of the axle in stock location, so bending it down doesn't get you very much. On top of that, if you do change the pitman arm, you change the steering effort since the leverage has now changed.
Best bet is to add enough caster to hold it down, but not so much you can't parallel park it. My truck is lower in front, and the drag link is not perfect, but it drives as good as anything on the road. I can drive 65 - 70 mph all day without fear of bumps in the road. Good radial tires, are a must have. With the axle bump stops and frame location, I can't imagine the drag link being to far off, there just isn't enough room with a stock axle. Now if you have a dropped axle, then all bets are off.
