Ball joint adapters

abodyjoe said

did chrysler decide the smaller joints werent strong enough or just decide to only have to buy one ball joint across the board?

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I dont know what "across the board" implies. Do e, b, c, f,m,j, all use this same upper ball joint ?
They continued to use the smaller a-body ball joint, employing both large and small for several years after they determined a larger joint was required in certain applications.