A coupling block is provided to dynamically adjust a difference in height between a first support structure and a second support structure attached to a conveyor frame. The coupling block includes at least one rotating cam attached to the coupling block. The rotating cam is actuated to move at least a portion of the coupling block about an axis to compensate for a height difference between the first support structure and the second support structure. A cam adjuster is also accessible from an outer face of the of the conveyor frame to change a direction of rotation of the at least one rotating cam.