Give it some time & go off road that 1/2 ton IFS will work it self ragged.
Not only that your PS pump will soon takke a dump.
My buddy had 39's on a z71 & the truck started to self destruct.
Thats why they say 4-6" on a 1/2 ton with 33-35" tires.
I am not trying to kill your post...I'm just saying I would not be in a hurray to go bigger on the tires.
I have a 5" lifted Z71 & I wanted to go bigger but I did a lot of research.
That is why the big boys do axle swaps.