Roadmarks: read these links. I like the one using a "stage 1" kit from American Classis best. See what you think. It shows both the AD truck and the TF truck.
http://www.classictruckshop.com/t1.phphttp://www.classicperform.com/tech_articles/Power-Steering-Trucks/Power-Steering-Trucks.htmAs I said I like the first one better. (just my opinion)
In fact, I worked at Advance today and can order me a gear box for $116 my cost with a core which I have. Then I plan to order the kit with the drag link from American Classic, then get my pitman arm from a junk yard or order it through Advance Auto.
I'm going to use a 68 truck column I already have. Since I can get a decent discount at Advance I'm gonna probably end up ordering new pump and hoses from them.
The first article is pretty good on details and pictures.
I also looked up the steering boxes for all the years they say to use and found that 68-74 used the same part # while the other years changed a time or two. I don't know the #'s changed but figured I would stay with the one for the most years. I don't think ratio's will make that much difference since its power steering anyway.
Should you decide you want me to order you one let me know. You could pick it up while down here for the Southern Stovebolters Reunion in May

EDIT: Les, I think I can come out with about $300 doing mine. Its $116 for the box, $130 for the kit but take off 10%, and I can get new pump and hoses for about $75 and probably get the pitman arm at salvage yard for $5....a friend may give me one.