Power stering

I just replaced the power steering box on my 1979 dodge B200. now when I start it it turns hard to the right and I can’t turn it to the left.I need help.

There is a problem with the control valve, it may not be properly centered. Did you remove or loosen the valve in this picture?

how do I center it

The Alldata doesn’t have that information, this is all they show;

6.Install valve body onto housing with valve lever entering hole in valve spool. Ensure O-rings are installed properly, then install and torque valve retaining screws to 7 ft lb

I have had these steer left or right after replacing the O-Rings, I just loosened the two bolts and moved the valve housing fore or aft (with the engine off).

Is the gear box used or remanufactured? You may have to return it.

yes

I got it from a junk yard and had it rrebuilt

Any chance you could have reversed the hoses at the box?