[lolife99]

X2 for Moog.

You can't blame the lowered suspension for your bad ball joints.
They are probably the originals,... and after 40 years they need to be replaced.
Also,... the person that put your spindles on,... probably punctured the rubber boot with a pickle fork when they were trying to separate the ball joint.

I would also check out the rest of the front end components.
A-arm bushings, inner and outer tie rod ends, idle arm, and the pitman arm.