Thanks for research Geof confirming my findings. It seems as long as the current steering ball joint MSR0670 fits all models employing rack and pinion steering, Jack Knight or later Quaife, then we could maybe close the subject.
Just to repeat this employs a female ½" UNF left hand thread each side. The inboard ends with rose joint have a similar right hand thread allowing tracking to be adjusted in or out with locknuts loose, by twisting either steering rod (strictly speaking not a track rod) accordingly, typically equal amounts each side. It could also be used as a means of equalising any rubbing of wheel arches on full lock whilst adjusting tracking, with steering wheel orientation adjusted last.
