If you are thinking about installing a stiffer front bar, there can be a problem. The sway bar brackets are bolted to rather a flimsy sheet metal.
The twisting when slow driving over uneven pavement or driveways would tear the metal, requiring repairing and bracing.
It happened with my Sports Sedan with the Shankle suspension. At the same time, it happened with a friend's Coupe.
Avatar is the 68 Super, bought new.