i would think the tierod would have a smaller taper than the balljoint. however, in my moog master catalog, there is a section that lists the specs of tierod tapers. i'll have to take the time to check this. in the mean time, i found a balljoint taper adapter in my afco catalog. it doesn't really say much as to what it fits. the part # is : 200388. i tryed to look it up on line, but it wasn't listed.