Mudflaps are easy pre 2008 Gs. You need the mounting kit and specific mud flaps. I bought it all from four by four club years ago. Post 2008 it gets a bit more tricky because if the rear gas tank armor but there is also a kit.Front caster correction.was a must for my lift amount of nearly 80mm. They got me back to the numbers I was seeing with a 40mm lift but not back to stock numbers. As for the other bushings I wouldn't do poly again but instead stick with OE. The ride is a bit more harsh and you definitely feel more of what you're driving over!