tahoe lift

I have recently purchaced a 95' tahoe, ls, 2dr. I want to lift it 4" - 6", have not decided yet. I have seen kits that include a new extended knuckle and kits that do not replace the knuckle. I was wandering if anyone has experiece with either type of kit? Do both kits lower the diff. housing...

So first off Im new to lifting but Ive done a lot of reading on this forum for information. Ill start off by saying i have a 1999 OBS tahoe 4door 4wd, with 100,000miles on it. I was looking at a 6'' lift and was gonna go with either the pro comp or the Dick cepek. Now I read if you lift the...