Boy I've had several different types of power steering on various 55's I've owned, driven daily and rode the trails with.The easiest way is to use a steering box from a solid axle 4Runner/truck. Using one of the readily available mounts makes this a bolt in installation- no mods needed to either the steering arm or the steering column. This is a good setup with up to 33" tires with any rubber bigger than that I'd do something else. The only real drawback about using the mini truck/4Runner box is that it retains the steering pivot.
On the orange and white truck in my avatar I ran a mini truck box until we sprung her over and went to 35's. At that time we installed an FJ62 box and got rid of the steering pivot in the front corner of the frame. Used Lke's high steer arms and steering arms and that truck was perfect. Good fell, went straight down the road and the steering was perfect. In both cases I ran an FJ60 power steering pump as I run an 87 2F engine with the mounting holes for factory PS.
The orange and white 73 I recently did up came with Sag steering mounted at the front of the frame rail. It was not a quality installation and turned right sharper than it could turn left. That was only an adjustment to the steering arm. The steering column, though, rubbed on the exhaust manifold (had a V8 in it). I decided to swap in a Scout box that had been on a rusty 55 I parted out. The install was easy, and it worked great. That setup used a Saginaw PS pump, the entire setup worked great. I cut a piece of 3/4 plate out, mocked it up to the frame with the box clamped in place, marked the holes for mounting the box and removed everything. Drilled and tapped the holes for the box then welded the plate onto te frame. Simple, strong, and safe. Instead of using a Ford shock tower we built a new one.
All in all I prefer a 60/62 box or a Scout Sag. I'm not a fan of the front mounted Sag boxes but there's thousands of them out there working fine, just have my preference. There's some pictures oif the Scout install on my build blurb-
https://forum.ih8mud.com/threads/back-in-the-saddle.738389/page-5. Gary S