Are aftermarket A body upper control arms worth it ?

SPC 2ND GENERATION MOPAR UPPER CONTROL ARM - Bergman Auto Craft

This arm is the only one on the market that I know of that uses a taller bj. This raises the roll center slightly. The raise in roll center isn't normally something to advertise, but in this case, it lessens the mechanical advantage over body roll. Think of a lever. Short lever, harder to move object...
Does it use a readily available balljoint?