How should my duster handle

MopaR&D said
As someone who owns a '70 Duster with fat torsion bars, front and rear sway bars, wide modern tires on 18" wheels, firm-feel PS box, fairly aggressive alignment with plenty of caster and camber... It does NOT feel like a modern car. It handles and performs like one, but still feels like a classic Mopar. It's hard to describe in words so all I'll say is, don't knock it until you try it.

Being able to feel the feedback in the steering wheel as the front tires begin to slip in a hard turn is awesome. Also being able to feel the feedback in the brake pedal and easily modulate the braking force with manual front discs is fantastic. Can't get manual brakes in any modern car. BTW my steering wheel is smaller than stock but still thin, I also hate the fat poofy wheels on modern cars.

The "experience" of driving a classic Mopar *to me* is more about the direct feel of the engine and chassis transmitting everything to your hands, feet and butt so you KNOW exactly what the car is doing at all times. Modern cars have too much NVH mitigation built in for that to work as well, everything is numb whether the steering is firm or not, unless maybe you're driving a Miata.

Much more to this than meets the eye.

I'll second these comments and dare I say my car handles better than lots of new cars. At moparty, there were 50 cars autocrossing total. That includes modern cars, trucks, and the vintage cars. I was 9th out of 50, and 4th in Vintage. Two of dudes in front of me had challengers with 315s all around and were much more "race prepared" than my car. The third in front of me was a dodge Omni (mopar version of a Miata). I realize that the driver has a lot to do with autocross performance, but its fun to say I have a 50 year car that gets around the course better than several modern cars.
When I'm not trying to make a turn at 60mph, it cruises really good. It doesn't float down the road like an original car. I feel connected when driving it. Floating down the road is fun, but I'll leave that to stock restorations or 4 door cars and station wagons.
I will never understand why people that build driver type cars automatically gravitate toward drag race inspired suspension components. Those are by far the worst handling components for a street driven car. If you're spending money on leaf springs, shocks, torsion bars, why not get some that make the car enjoyable to drive. You don't have to autocross or road race to run a 1.08 or 1.12 torsion bar. Guess what, they aren't going to rattle your teeth out with a good shock. You know what will, SS springs or caltracs with drag race shocks. I've been there and I'm never going back.