Steering problem, need help..

I have a steering problem and need some help. I have a 1973 matching #'s 340 Duster. Over the last 4+ months I pulled the motor out, cleaned the outer block and Repainted it, reinstalled it and added new headers, new alt,new powersteering pump,new water pump, new intake, and new carb. I runs great. But , Hear is the Question....When I pull out from a lot to the right or turning to the right while accelerating the steering wants to lockup.it only does this turning to the right while moving. It don't do this while sitting and iddling. I have checked the draglink, its not hitting anything. Can any one offer some help as what could be causing this? Thanks.