control arm stiffners

Tim.
Thinking this over for a bit, i guess one could use 66-69 B Body sway bar mounts tabs, as the proper factory style 65-72 A body mount tabs aren't repoped.
One would have to weld the B body ones, onto the LCA, onto the top of the arm, and hook up the end links of the sway bar, to that mount.
Now all this is for a factory sway bar.
Don't personally know about aftermarket bars in their style, or manufacturer, in how they mount them onto the LCA.
Using the factory mount locations, or their own designed custom mounts, for their bar.
Are you intending to use, a Factory sway bar?