[dsraven]

with that style of bushing the bolts get tightened down with the vehicle sitting at ride height, otherwise the rubber is under tension the whole time it is driving or sitting, the only time the bushing is under no torque load is when the suspension is sitting at the same ride height that the bolts were tightened down at. they last longest that way (when tightened at ride height).
silicone brake lube grease is what I use to install the rubber parts. works pretty good usually. some antisieze on the bolt or inside the steel bushing.