The stock arms are stamped steel, and if original I'm sure the bushings are toast...... Tubular arms are much stronger and less prone to flex and can be had with polyurethene bushings... As stated on your other post, same subject, the big tires are prone to unloading and a lot of flex and bounce. Just the nature of the beast... Smaller size radial tires would hook better and not be so subject to a case of the wobbles when you lift....

What shape is the rest of your front end in? Idler arm, tie rod ends, pitman arm, etc...?????