Whats wrong with my Dusters front end?

Hi, I have a -71 Duster with a -73up front end. Spindels, brakes, pitman arm, steering box (power steering) centerlink... everything else but control arms are from a late A-Body. Problem is that the car is acting strange, its hard to explain but its almost dangerous to drive. Feels like theres something loose, but everything is in place and all bushings and joints are new. Steering is very fast, again turning circle is quite large... What did I do wrong??