What is the procedure for changing front spring bushings on a Peterbilt 379?

If you don't know what you're doing, you will hurt yourself. You'll need an air hammer, a port-a-power, a jack and jack stands, and a bottle jack.

email me if you really want to go through with this, as the answer is a bit long... a little too long to be feasibly typed out here. Next time I have to change them out, I'll try to make a photo log of the procedure, because you really need to get eyes on this repair in order to get it right. Like I said, you can hurt yourself badly if you don't do it right.