hi Jerry
even though the rear axle it tied in with the radius arms, the axle can still be tilted to the left or right as the axle is strapped to the centre of the spring using the u bolts.
if you loosen the u bolts you can move the axle, with a pry bar, but only as far as the clearance hole on the axle mounting bracket lets the axle move against the spring, ie there is a bolt holding all the leafs together on the spring and this sits in the hole on the axle bracket, with slight clearance between the bolt and hole. This can make the rear axle sit again 2 deg to one side, see next pics after we squared her up.