Steering Box - What model is this? Should I upgrade to power?

As to the PS box; You can take some sensitivity out of it by swapping in more or, stiffer reaction discs like I did, and set it up how you like it. And you can play with the pressure as well.
Once I had it tuned for my little 12 inch diameter, thick-foam-rimmed steering wheel, it was fantastic fun.
I got the discs from the Mopar dealer for next to nothing cheap.