look real close at your Idler arm and Pittman arm, drag link and all the other suspension components, the idler arm will cause your steering to wander a lot for sure, but worn ball joints/tie rods will also....what kind of wear do you see on your tires? can you drag your hand across the tread and not have it feel like a saw blade?, cupped, wear o0n the inside/outside edges? a little more info would help...
HTH,
Ben
