Mark, the above kit looks like a good idea for adapting the '73-'76 -larger/beefier/BUT heavier- knuckles to the early ball joints, but you'd still be using the same early (small) ball joint and control arm. If it's the early ball joint and control arm that is the issue, this kit isn't gonna be of much help.
Afco makes low friction all joints, not sure about 'better quality' as John asked for, but likely are.
http://www.afcoracing.com/#