The one piece bushings shown are for 67-72 strut rods. The 2 piece are 73-76 strut rods. They can not be interchanged due to the strut rod length at the front threads being different. The two piece shown are for coarse thread and the one piece is for fine thread. The coarse thread takes the metal sleeve in the kit the fine thread does not there is no room for it as the picture shows . also if you use the 2 piece shown on the fine thread with the sleeve the pin hole will not line up and it will push the lower arm rearward