Few questions for you guys, thanks for helping.

So i read around on the forums and for the most part it seems that the 265/75/16 size tire would fit fine on my vehicle. It also looks like most tire calculators do not recommend this size because it increases the Overall Diameter by over 3%.

I bought the LT265/75/16 Bridgestone Revo 2 and the ride seems fine but at full lock I can hear weird noises coming from the vehicle, it doesn't sound like a rubbing noise but more like a vibration.

1) Do you guys think the noise is from the power steering?

Since I am basically going from a 31" tire to a 32" tire, I am losing about 0.5" clearance in the wheel well correct? In that case, I was thinking about getting FJ Cruiser springs to increase the clearance by that much.

2) If I get FJ Cruiser springs should I get FJ Cruiser shocks too? I was thinking about getting bilsteins shocks for my 2WD and using the FJ Cruiser springs. Would my OEM shocks suffice?
3) Any difference with the FJ Cruiser regular springs vs the trail edition and the trd edition? My vehicle is a 2wd (2003 V8 SR5) and I don't know what is best for me and what will fit.
4) Are there any difference in the springs and shocks from the 2009 4runner trail edition and the SR5? I know that the 2009 Trail has a v6 engine so it may be engineered differently.

Once again thanks! I tried searching around but I couldn't anything with as much detail as I am looking for.