there is a guy in my town that has more than a dozen javelins in his collection. I am quite sure I could dig you up a box in time if you had to have one. A power steering box not beeing used under power, really really sucks and tends to have slack in the steering. Also, don't over think the master cylinder. The booster has the mechanism on it as well as under the dash. I do a lot of conversions as to what your questions are asking. It really is not as hard as you think it will be.