Spindle ID

446acuda said

The spindle and steering arm are both the same. The ball joint presses into the lower control arm on all F/M/J bodies and on '73-later B bodies.

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I disagree with that.
Take a look what a "B" body spindles looks like, and what an "F" body, Aspen & Volare spindle looks like in post #6.
I'm not that familiar what M or J body cars, spindles look like.
In appearance, they have differences, even though they all will work when doing disc brake change overs on older cars.