yeah, I am wanting to drop mine as well in the front. I used the wheelrite tool and I cant see anything deeper than about 4.5" BS with the 17" wheel. I was thinking I could get 5.5 back in there but the rim will contact the UBJ, the UCA, and the TRE when locked. I'll have to take more measurements and consider this as I don't want the front wheels tracking outside of the rears.