well here's the thing. When I took them off I used my 1/2" drive rachet. The length of the socket was enough to get the nut off.
When I put the new one on I tightened it untill the bolt wouldn't allow the socket to turn the nut. It still didn't "feel" tight due to the bushing compressing.
I would think that with a moving part such as this that is contantly at differnt angles that the amount of compression on the bushings would have a factor in the longevity of the part.