Still gotta ask ... What are you trying to gain by doing so?
Most of us who have merely rebuilt and properly adjusted our stock/original front ends (spindles, bearings, tie rod ends, king pins and steering boxes) find that we end up with steering that is pretty close to power assisted with out the expense and effort. My 1-ton goes down the road straight and nice at 65 MPH and steers pretty good at slow speeds, too. I completely redid the front end on a 1.5-ton (4400) and could steer that truck at a low crawl on dirt with one finger.
Just an option to consider as it sounds like you have a pretty original truck. It would be a shame to go to all that trouble just to find out that gains over keeping it original (but rebuilt back to original specs) were marginal (IMHO).
There are a few (very few) reasons to go with power steering -- such as medical condition, etc. But barring any of those... you might try checking out someone's truck who has rebuilt their front end to see what their steering is like before you go to a lot of expense and effort.
Just food for thought ...
John
