My truck has a 6 inch lift right now with 4 inch blocks and an add a leaf on each side in the rear. Im putting 8 inch front springs on so I need to bring the rear up some too. Im replacing the blocks with a shackle reversal kit so ill still have 6 in the back. What if I put another set of add a leafs in the rear spring pack, theyre exactly the same kind of springs that came with my 6 inch kit. Will they still lift my truck even though I already have add a leafs? If I was thinking about a zero rate spring for another inch. I seem to remember seeing angled zero rates somewhere to correct pinion angle and lift an inch, but I cant find them anymore.