Torsion Bar Recommendation

Tuff call for adding handling and maintain ride comfort. Ride comfort alone is very subjective. Sway bars typically don't diminish ride quality so you might add front and rear sways before torsion bars and see if you like the added handling while maintaining the ride quality you have now.

I agree with abodyjoe, get some better shocks i.e Bilstein, Hotchkis, Viking, etc. I do feel KYB's for A bodies have a bad name because people don't realize they are stiffer that stock (meaning they control higher spring rates better) and really a bottom shelf performance shock. There isn't really that arena for our cars where folks want a drag suspension, OE or road handling suspension. There was a time when KYB was it for us for a performance shock and KYB makes more than one model of shock (but not for us) and is OEM to many major brands.

Short walled tires and better compounds aid in handling (and braking) too.

Modern Alignment is another thing to consider.

The slope thereafter begins to get slippery......