If you are unlucky enough to have American Ford Granada spindles fitted to your vehicle then the track rod end(tie)

rod end may not fit properly because they use a slightly larger taper some people put washers under the nuts this is not good practice so while this track rod end is not correct for your Mustang it will fit your Granada spindles with the same thread . taper size is roughly 14.37 mm to 16 mm

13/16 18 tpi