After going through many lift threads and looking at many pics over here I'm steel confused. I'd like to lift my truck and either go 4" or 6" more likely Zone kit or less likely Fabtech kit. Rancho struts seem not to be adjustable as Bilsteins, though I'd like to keep the front Rancho struts, they are in a good shape, as well as rears, but rears need upgrading for sure. Currently my truck is leveled and needs some repairs at the back and I'm considering whre to go now. I'm running 34" (275/65 R20) Toyo ATs. My question is what lift I do get with 4" or 6" and if something like this is achievable with the kits I mentioned. I'm planning to do UCAs as well. I would not like to go higher than the truck in attachment, but I wonder if it is 4" or 6" actually.