Truck pulling to the right slightly, what can i do to fix?

Where are you located?

 

Go to YouTube and search Freightliner rear spring bushing replacement.
You will see how it is done WITH OUT removing the spring from the truck.
Is really quite simple.

 

There are presses that are made for the job but many people build there own.
As you can see though there is no need to take the springs out of the truck and get involved in replacing things you don’t need to.
At this point I think you should contact MD alignment.
They are a network of shops with an old school mentality.
Any of the ones that I have been to have the tools to replace the bushings right on the truck and there alignments are top notch.
A quick search on their site shows 11 independent shops certified In Wisconsin with the md system.
It seems there should be one with in reach of where you are?
Just give one a call usually real helpful on the phone also.

 

Two hours that will be well worth the ride and money saved.