74 dart drum sbp to lbp disk

You need a set of lower ball joints for a '73+ disk equipped A body, the 5th ave ball joints won't work (obviously!). Bolt spacing on the A body joints is the same, so they bolt right up.

Lower control arms stay, 5th ave lowers are not compatible.

You'll also need a longer set of bolts for the '73+ a-body lower ball joints, the A body lowers aren't threaded like those are so they need a nut.