To ensure a good fit, we used some sandpaper to remove the coating off the area of the AEV tire carrier where it rides in the bushing. Then after installing the Zerk fitting (facing it downward) in the AEV spindle-housing bracket we temporarily installed the mount using two 1/2-inch bolts and the other hardware provided. We just hand tightened everything so it was snug but still loose enough that we could adjust the spindle housing. With that done, we installed the spiral-cut bronze bushings into the housing. They have a slight interference fit, so we gently tapped them in place with a dead blow hammer and a block of wood.