I do not know how to get a bushing out of the spring eye.
I recently went through this on the rear of my 1-ton. While some of the details are different the concept is the same.
I made a receiver from a short piece of pipe long enough for the bushing to drop into it. This piece need to have enough inside diameter to take the bushing but small enough outside that it made good contact with the spring. I ended up welding a ring inside my pipe to get it the right size.
Then I made a push tool by turning an inch or so of a round metal bar the right diameter to go into the bushing while leaving a shoulder on the bar the same diameter as as the bushing so when pushed it would push the bushing.
I found the rear of the 1-ton uses two different size bushings so I had to make two different push tools.
I've scrapped a few real rusty trucks over the years and keep metal I can see being useful. I made the push tools using chunks of the big round emergency brake rely bar which was about the right diameter for the biggest shoulder I needed.
I then drilled holes through the whole setup parallel to the pins and bushings and tried to work it with threaded rod and nuts but it did not work that way. I managed to ruin some nuts and threaded rod. I was using pretty stout stuff but it wasn't stout enough. Since I ended up doing it in the vise the holes were not required.
My second attempt was to mount it in my largest vise and that barely did the job. If I had to do this on a regular basis I'd want a press to do the job.
I used scrap metal I had laying around and turned it to fit using a lathe. You may find that some old sockets are close enough to the right size for your truck and not need to do the machine work. I did it my way because I inherited my grandfathers lathe and really enjoy actually using it from time to time. Its sure not the only way to do a job like this.
