I'll write down what I've learned about power steering. There basically 3 types of hydraulic assisted steering.
The well known Garrison steering uses a valve on the steering link to meter pressure to a slave cylinder on the center drag link.
The most common steering arrangement on trucks nowadays is the unitized worm & sector box. On very heavy trucks, you will often see 2 boxes, one on each side. Normally this is on axles of 20,000 lbs and up.
The third type of power steering box has 2 hoses to the box and, an internal metering system. It also has 2 hoses out of the steering box that go to a slave cylinder. This was a common system on the early Chevy trucks.
Sometimes the slave cylinder was on the center drag link, as used on the Garrison. Sometimes, it was on the steering link between the pitman arm and the steering box arm.
Most steering boxes have the sector shaft at the top of the box and, the worm shaft at the bottom. This allows a fairly short steering arm.
The box on my Chevy has the sector at the bottom and, the worm shaft at the top. I bought a good box but, the arm was too short.
Looking at OEM Chevy boxes in the early years show a very long arm that should make the conversion easy.
I already mentioned that my truck has a horrendous death wobble that will throw you across the cab and, the truck goes insane.
I tried various caster angles.
I made a big heavy link that connects from the leaf spring cap to the frame.
I put on a huge steering dampner.
I took off the new nylon tires that had about 3/8 inch of runout and, put on the old, worn tires.
These helped a little bit. The truck still makes a hard left when it goes crazy. I slam on the brakes and, come to a stop out in the center lane,,, if I'm fortunate enough to be on a wide street .As I improve things, the wobble comes in at a higher speed. You can understand why I don't want to drive it.
I've come to the conclusion that I need to change to power steering to stop the feedback from the steering arm to the steering wheel.
I'm afraid that; if I put on the Garrison unit, the feedback will be amplified by the spool valve on the steering link. I need to put on the box with 4 hoses and, a slave cyl.
The box number is 5690653
https://www.mylittlesalesman.com/197...et-c60-9586567