Handling without front swaybar?

I’m not sure what car you have and how rough the roads are. But my ‘66 Valiant wasn’t too bad with stock “sport” suspension with 14” tires on Michigan streets which are like 3rd world roads.
All these old cars have very soft springs, pretty poor shock dampers & small tires.
Like coil springs there are stiffer torsion available. The progressive rate of the torsion bars should work in your favor too. Larger wheels, 14” replacing 13” of most A-bodies, and taller tires can help too.
I think there are some guys Rallying their cars and they might be able to help.