Speedometer evaluation?
The bushings wear egg shaped. I suppose you rotated things to measure movement. Speedometer repair aint cheap. Those little bushings are made of a naval bronze. I couldn't afford to have them made in small quantities and we had the raw material left over from a previous job.
My money would be spent on a 68 up without the trip clock and a new cable with the improved attach design but... these cars aren't daily drivers anymore. A lot of years to wear out any speedometer. Good luck with it.