Whats wrong with my Dusters front end?

The tubular control arms have additional caster built into their design, which is a good thing. They should make it easier to get a proper, modern spec alignment.

If the steering box was rebuilt and this is the first time its been run its VERY possible that it needs to be re-centered. Somewhere on here there's a detailed thread about how to do that, its not all that difficult, but I'd have to look up how to do it myself as I haven't had the pleasure.

At some point you should also find out what the actual numbers are on your alignment as well. If its been aligned to factory specs you're doing yourself a disservice, those specs were intended for bias-plys. #-o Something in the range of -.5* camber, +4* caster and around 1/16" toe in is where you should be.