The bushings in the front suspension of your muscle car have two main purposes. One is allowing the pivot points to move and the other is to isolate and dampen vibrations transferred from the road. GM uses rubber because it does a great job at dampening and yes it allows the pivots to move.inline_mediumwraptextright32180919/technical/chassis/suspension_steering/sucp_1003_1966_chevy_chevelle_polygraphite_bushingssucp_1003_01+1966_chevy_chevelle_polygraphite_bushings+tech.jpgTrue