I can add to this post as I have had first hand experience with this issue.
I first installed on my rig 305-70-r17 tires, I had a stock suspension I added 2 inch front and rear coil spacers, and this somewhat solved the problem, but i did have rubbing when I was going fast and I would hit a bump, it would hit the wheelwell.
Then I went down to a 285-70-r17 tire, and i added a tjm 2in suspension lift and i removed the coil spacers. I didnt have any rubbing, I then added a 1.5In wheel spacer and there was rubbing when turning.
I removed the wheel spacers i think if i had a 1in wheel spacer it would rub. I just bought a 1in body lift from toyotec. i will be posting pics of this on a new thread.
As for sterring rack issues, i have had to change it twice. I dont know if this has to do with the larger tires or lack of maintnance after wheeling.
I havent had any issues with my cv boots, but i just changed my front diferential, i had an oil retainer leak and didnt notice until the front diff started humming. I have also changed my rear drive shaft.
hope this helps