mild street suspension question

There's more to getting around a corner than springs and tires. You didn't say if you had power or manual steering. If you have power, and want to keep it, recommend a cop car steering box. Spot 'em yards by a cooler on the Saginaw pump. The Dip & Fury boxes work fine though you'll need to swap the pitman arm.
If you have manual and want to speed things up, use the Mopar worm & nut package, P4007612. Changes ratio from 26:1 to 20:1.
Going to a smaller steering wheel will increase steering effort regardless of assist or non. It decreases the leverage you have over the steering box. It won't necessarily change the feel. Personally the stock power box is too light with the standard bus sized steering wheels.
I agree with suggestion to change to polygraphite bushings. It makes steering much more precise, improves road feel, and doesn't seem to make the ride any more harsh. I've used PST & Just Suspension kits in the past with satisfying results.