How should my duster handle

Sounds like you're getting the car to drive the way you like so maybe it's a moot point but the alignment specs are not optimized to radial tires, IIRC. If you're running E70-14s, the factory specs would apply but more than likely you have something more modern and it would therefore benefit from alignment specs more in line with the properties of those tires.

So...I probably could have saved a whole bunch of keystrokes and just asked: what are you running for tires?