Re: Power steering
There's not really a "bolt on' solution for a power steering box, yet. There are some guys in California working on a setup based on a a 1980 Toyota Corolla steering box that is looking pretty good. They are having castings made last I heard. Retail price is expected to be like $550 US dollars. You might Google up more info if you like the idea.
The main alternative is to refit a factory setup. Not really a power steering "box" it is regular steering assisted by a "power ram" that hangs off the center steering link. Mostly. Plusses are that you could buy about all the stuff to make it appear like your car came with power steering from the factory. You would have power steering.
Minuses-nobody ever seemed to like the setup all that much. It tends to be prone to leak problems. There is no "kit" so you'd have to scrounge up all the bits and pieces. If you had to buy them all new it would likely add up fairly close to what it would cost to buy a rack and pinion kit.
Last-a rack kit. "Total Control Products" reputedly has the "best" of these. Also the most expensive. "Randalls Rack" and "Unisteer" are a couple of alternatives. I believe there are some guys down there called "RRS" that may be able to help you out with a rack kit (and save you a bunch of shipping/import duty money).