I would advise to do it on a different truck, not a daily driver.
But you will have to cut out all the old a arms, 3rd member, crossmember for the third (or whatever that thingy is called), and take out the rack and pinion.
Then you will have to use an actual steering gear (I'm [will be] using one out of a pre-95 toyota ifs pickup), crimp (or have crimped) the correct fittings for the ps lines to run to the steering gear, modify your steering column to mate to the new steering gear, mount axle (coil buckets, radius arms, panhard bar), build steering, and modify/build a new driveshaft.
That's the simplified version that's pretty much the plan of attack for me when I finish my parts gathering.