I'm replacing my power steering gear box on my 70 'cuda with a 73-74 rebuilt one. Do I need to change anything else then the pitman arm? Do I need to replace the idler arm? I have the 73-74 steering box (rebuilt) and a pitman arm from moog. The pitman arm look a little different then the old one. It's curved to one side. The one on the 'cuda is strait (at least it look that way when looking at it for under beneath the car).