I'm not sure what pitman arm setup i have just yet, as i just got this car a few weeks ago...But I do know that it steers almost as easily as if it had power steering, even when sitting still. Not sure if the previous owner put something different in or what but I like it!
After some more searching, it does look like the Doug's Headers come with everything needed whereas the TTI's don't. That alone will save a bundle providing they fit well.