Pro Comp 6" lift issues

SO i have a pro comp 6" inch lift on my taco and i have a few issues i've noticed with it. Whenever i start up, my truck vibrates slightly because of the angle of my drive-line because of the lift. Anybody else have this issue or know a good way to remedy it? I put some inch spacers on my carrier bearing and it seemed to help slightly but not much.
Also my leaf springs squeak like a mother fucker and no matter how much sliicone lube i spray on them they always begin to squeak after awhile. Im guessing this could be cause of the spacers on the back pushing the springs closer together... i dont know.