Power steering questions

Going to add power steering to the Dart this fall. 400 stroker , same as 383 so should be straight for ward? Between Saginaw and Federal who prefers what. I'd like some ideas.
Oreilly's has a Federal lookalike that I hear is close to Moog for $57. steering gear for $105 + the core charges. Will I have to change the Pitman arm. In other words what do I need to go Federal or Saginaw . Can I mix match. 1968 Dart