eccentric cam and ball joint to spindle angle

I understand there were only 2 versions of UCA: 63-72 w/ small ball joint, 73-76 w/ large ball joint. The ball joints have 2 different shaft sizes, so if it fits your spindle, you have the correct UCA. There were more spindles - 9" drum, 10" drum, & disk for each UCA. I am not clear on 73+ drums, I think they might have kept using the early UCA and spindles, and drums didn't last long after 73.

A tip on tightening the eccentric cam bolts. Keep all bushings loose until you lower the car to the ground, adjust the ride height, and bounce it up and down a few times. You only want to tighten them in the "neutral position". If you were to tighten them with the wheels hanging down, the rubber would have a strong twist at neutral hieight and maybe twist so much it shears when the front goes down in a bump.