Since this question seems to be answered, can I just hijack a bit...
How hard is it for an amateur to replace these bushings? Is there any tricky parts or is it all nuts and bolts?
Are these the best bushings to use for nice tight handling? I know they make these bushings out of all sorts of materials, I don't know which ones are considered the best. But I want to tighten up my trucks handling as much as possible.
As for installation its pretty straight forward. I personally would recommend using jack stands and a jack just to get a bit more room to work with, also taking the wheels off help. Other than that the hardest part is actually getting the bushing to come off the sway bars and putting the new ones on. It wasn't too difficult to do but it took some elbow grease to pry the new bushings over the sway bar and into position.
The rear bushings are the easier to install since the bracket holding the bushing only has one bolt. The front bushings are a bit tricky. There are two bolts holding the bracket that cradles the bushing, and one of the bolts is in a weird position and had some trouble getting it out, but having socket extensions helped just be ready to sit there for a bit.
Personally I put the bushing on the sway bar and slide it into position first and then put the bracket back on. Also might want a to have a hammer with you when you do this since the bracket can be kind of stubborn to get back on over the bushings.
As for tightening up the handling, I think there's a lot more that would need to be done for what you want to do than just sway bar bushings. These bushings are good and I don't have any complaints about them but I would need more info on exactly what you want to get out of your suspension.