Mike (73Swingerbuild) asked me a very good question. He was concerned about the thrust block since he will be using green bearings. The thrust button on the clutch type is what has to be removed. The thrust block on the cone type also holds the preload spring pack in place. It cannot be removed. The axles will fit and work fine with the green bearings with the thrust block in place. In the cone style, it is a necessary piece.