The 1964 1/2- 1966 Mustand Disc Brake Conversion Tie Rod Adapters (PR) is for use when installing 1975 - 80 Granada, Monarch, Versailles spindle on 1964 1/2 - 66 Mustang Inline 6, V8, early Falcon abd Rancharo.







In plain English if you are using the horrid Granada set up on your car you will need these to reduce the taper for your track rod end {tie rod }

Throughout the years ford used lot types of tapers here are the most common Below

64/66 six cylinder
64/66 v8
64/66 v8 power steering
67/69
70/73