A Body Disc Brake Swap 101

S'cuder said

Your LCAs have no bearing on which lower ball joint you need. The '73+ spindles require the large bolt holes that are in the later ball joints, so you're good there.
Your upper ball joints need to be the 73+ large shaft to fit the spindle, which requires the '73+ upper control arm, or use the early UCA and an adapter sleeve like those sold by Dr. Diff.

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Thank you, I was familiar with the use of the upper control arm and larger upper ball joint. Just not sure if the 73+ ball joint would work with the stock lower barracuda control arm.

That makes me happy so now I can do my disc conversion with what I have for actually less money than buying a pair of factory 65 lower ball joints. Just hope my outer tie rid ends from the 65 barracuda will work with the 73 lower balljoint/steering arm.