Thanks man!
It was counter-intuitive thinking for me as well. I performed the Tundra big-brake kit on my last two 3rd gen's, and here I am taking off a big-brake kit to fit some 16's on the 4th gen!

Then I thought - if the Limited, the SR5 and the FJ are all running this package with no issues, I should be good to go with them too. No issues so far!
The Ironman is a great lift - the boys at MetalTech took the time to talk with me about the lift (and the nitro-foam cell shocks), and I thought I would give it a try. And it's actually the lift kit for the '07+ FJ, so I guess I have as many FJ parts on my rig as I do 4Runner parts... LOL!
Keep in mind that I am also running a Daystar 1" spacer in the front and the Daystar 1.5" spacers in the rear (on top of the Ironman). I measure out at roughly 4" of total lift in the front and nearly 5" of total lift in the rear. I wanted as much suspension lift as possible, so that when I install my BL I'm I able to clear 315's on my next tire selection.