I have BFG a/t KO's in 33x9.5 (yes they come in 33xNINE.5) and 3 inches of lift. Zero trimming.
I measured before and after the lift and I really got almost exactly 3". They fit fine on the street, and can be turned lock to lock on stock rims ( at lock the LCA is less than 1/8 inch away, but there's definately daylight between them, NO rubbing).
I intend to add another 1.5 inch of lift. (bringing me to 4.5) But I took it on a trail ride as is becuase I couldn't wait any longer for the parts to come in. I left the sway's connected, and stayed on the bypasses, but I have a great time and only had very minor rubbing on the middle of the inner fender well when I was on a steep down hill, sharp left turn.
I am expecting that with 4.5 inches they will be fine, but I'll know for sure after I see for myself (hopefully next weeknd). Work schedule permitting, I'll be putting 1.5 shackles and adjustable front coil spacers on Saturady. If I have any rubbing after the extra lift, I'll just start trimming. I have not trimmed anything yet, but I'm not afraid to, I just wanted to get the full lift on before I see what needs to go. I am expecting that if any, it will not need much trimming, but this isn't my daily driver, just a weekend toy. So if I have to trim the crap out of it, so be it.