I think a hybrid approach might work. My 67 has recently become pretty close to a daily driver with a 35 mile commute each direction, so I've been working on doing what I can to make it more pleasant to drive. I have a 24:1 factory manual steering box and a 73+ k frame, so pretty much 73+ steering parts and vintage E body front disc brakes (brakes were on the car when I bought it, but I replaced all the steering stuff when I did my 5.7 Hemi swap with the K frame). My car was really light on its feet on the highway at speed and took a lot of steering wheel correction to keep it going straight. The bushings and joints were all fairly new as I had a spare kit from a 69 Charger from many years back that I went ahead and put in my car (poly uppers, I think just regular rubber for everything else). Recently finally pulled the trigger on a set of HDK upper control arms to get some more caster in the alignment and I'm kicking myself for putting it off so long. Car feels much more stable and closer to a modern car, though the steering is still a little loose right on center. Granted, my other "daily" is an 04 Viper, so I don't have a lot to compare it against.
That being said, while I'd love to go with a rack and pinion kit, the only way to really do it right is to replace the whole front end, which I'm not sure makes sense for me at least for the use case of my car. I don't recall what size torsion bars are on my car right now, but I'm sure they are on the lighter side. If they are original to the car they are probably still the slant six pieces, though maybe they swapped them with some kind of SB rated ones in the past. Shocks are standard parts store, maybe Monroes (yellow tubes). I did have a factory sway bar on the car when I bought it. Overall I think it's a great cruiser in its current config and pleasant to drive. Sure, it's not nearly as sharp and capable as something like my Viper, but it's not a wet noodle going down the road either. Tires are also going to make the biggest difference in any feel for any car. I just swapped some fresh ones on and it went from feeling uneasy in the corners to feeling more confident. Frame connectors are next on my list to try to address the chassis, but not sure if they are going to make it before winter or not.