Edited to reflect recent changes

When I got the truck it wobbled like crazy at about 50 mph. I adjusted the pins and got 15 pounds on the passenger side and 13 on the drivers. The car is a lot more stable but still does the hokey pokey around 60mph. I did a new upper swivel pin and bearing on the driver's side and now it's at 15.3 pounds, I get to about 61 before it shakes violently now.
things to know:
I just replaced the panhard bushes, seemed to help
i adjusted the steering backlash, no more play in the steering
steering pump makes a ton of noise and the box has a lot of slop/play. One of the two is leaking like a siv.
it was a northern car so im assuming all the bushings are toast. The springs and shocks need replaced as well

Any input on what I can do to make it drive with stability?

 

Did you get a set of new shims and check the pre-load when you put the hubs back together? Not sure what pounds you're talking about.

The steering backlash can be adjusted (allen bolt on top), and can allow wobbles if too loose. What size tires? Lifted? Good steering tie rod ends? Maybe replace shocks first.

 

New shims and pin on the drivers side, both hubs are at 15 pounds now. All tie rod ends, bars, and the steering damper are new. I was told the pin goes into a bushing that needs to replace. This is the first ive hesrd of adjusting the backlash, ill look into this too, thank you

 

Take a crowbar and pry between the front axle and the radius arm bushes. If there is any wiggle they are toast. I did most of the other fixes prior with no change. Replacing those made a big difference and I no longer fear highway driving!

 

I already replaced those

 

I did the backlash, steering is better but we still do the boogy woogy at 61.5 mph now

 

You said panhard in your list. Radius arms bushes are front and back on each side under the axle. If you did those already my bad. The other thing that helped was a good alignment and tires that are not worn funky. There is a list of things to check in the forum search "death wobble"

 

I haven't done the radius arm bushes yet. Theyre definitely on the list, this was a northern car so im just assuming all the bushings are bad

 

How are the front upper shock bushings?

 

shocks and springs are toast, theyre ordered so I'm just waiting on them to come in