Def 3 link will work better than a two link (radius arm). But I would venture a guess, that those stiff ass leafs are your worst enemy.
BTW, I never thought much of doing it. But my buddy, Chris, has a Cherokee with a radius arm, long arm set up like yours, and he only runs the upper link on one side. He says it flexes better. And I do know his flexes really well, but he also has softer rear leafs, so...