i have a 2001 zrt and i am a bigger person. i would like to adjust the rear suspension so it doesnt ride low and bottom easy. i have the stock adjuster blocks on highest setting. How much stiffer would aftermarket blocks make it? how would it affect it if i also switched front spring arm holder to a taller block? also for the rear arm where it mounts to slide rail, there are several other holes. how would it affect the ride if i moved the mounting forward or back along with bar that stops it? right now it is mounted in the second hole from the front as it was from dealer, and the front spring is set pretty tight.