There are a few threads about low lift. The biggest thing is your mounts have to be set up correctly. I forget if you have a drop front hanger. If you do, cut it out. Make sure you don't have vertical shackles. Get a lot of angle on them.
And flatten your springs !!!!!!!!!
It would take ALOT of work to raise my front hanger, I was hoping to do it all with the springs and frenching the rear hanger, my shackle angle is pretty good now, just dont have the time to cut and redo the front stuff right now, maybe later but then it will prolly require cutting and turning my axle also, lots of work.......