Will new torsion bars correct that POS, bucket-o-bolts feel I have?

I am disillusioned with my 72 cuda, here is why:
I rebuilt the entire front suspension to factor replacement parts, but kept the sway bar and torsion bar, which is I believe ~ 0.88" dia. The rear suspension has newer, heavy duty springs.

When I drive over bumps, especially while turning, the car feels like it's going to fall apart. Will updating the torsion bar improve things, or make them worst. I am targeting a 0.96" bar from Summit with stock ride height. I don't mind a stiffer ride, I am just worried that stiffening things will worsen things. Overall my cars is nicely restored, and is a survivor with no structure rust (was undercoated) but some sheet metal rust.

When I drive my buddies Challenger, it is such a nice riding car, minus the bucket of bolts feel?