John, I assume since you've previously voiced not having torque steer issues and/or pronounced caster issues on your rig you are running your front end height a little lower. That and along with your stock UCAs not allowing as much droop might explain the difference. Since lowering my front end I've noticed significantly better ASB bushing life...
Also over-tightening the nuts that secures the riser links to the ASB, that also contains the rubber bushings, thereby applying to much preload on those soft rubber bushings, would contribute to shortened link bushing life as well...
Also over-tightening the nuts that secures the riser links to the ASB, that also contains the rubber bushings, thereby applying to much preload on those soft rubber bushings, would contribute to shortened link bushing life as well...