This is a follow-up to my prior post in this thread. Thanks to a PM from Rocket Man I realized that my response was misleading.

I was confusing rear leaf spring bushings in Chevy cars compared to trucks. Both use a rubber sleeved bushing in the rear suspension but in different locations.

In many of the older cars the bushing in the front eye of the rear spring is a rubber sleeved bushing. In trucks it is a metal sleeve that the pin goes through.

In some trucks the rubber sleeved bushing is used in the bracket that attaches the rear axle to the spring.

In either application the bolt that clamps the inner sleeve of the bushing should be tightened only when the suspension is loaded. The truck shop manual describes this procedure.

I apologize for the confusion I created.

Rusty