Does rear SWB = rear sway/stabilizer bar, as in RSB? Unless I miss understand what is SWB, I can't imagine the need to pound anything to install that.
Front/Rear sway/stabilizer bars should be tightened with the suspension under load. Mount the bar via brackets to the chassis first. Then mount the end links to the bar. The end link ball joints can rotate to fit into the rear cross member; b/c this joint allow for movement, I can't imagine why you need to pound anything... unless you are installing stiff aftermarket end links that have little to no articulation and/or with the rear end suspension under full droop. In this case, I hope your suspension is also very stiff and doesn't move/flex much or you'll end up with broken end links sooner than later.