I recently replaced my leaf spring shackles. Amazon $12. I had to loosen the bolts just enough to get a sawsall blade between the head of the bolt and the shackle itself. Cut the bolt heads off, drove the bolts in a little bit and put the blade between the shackle and the nut and cut that end off too. Threw all that crap in the trash and put on new shackles, bushings and bolts and eliminated the rear end sway I was getting in turns. I have 33's on my '04 4x4 extended cab with no rubbing. I put "add a leaf" on the rear and cranked up the torsion bars enough to almost level the truck out. I've never really understood the torsion bar keys. I understand that it somewhat "pre loads" the torsion bar and gives you the ability to crank it up more, but It doesn't change to position of the torsion bar once it's cranked up to where you want it and I can't think of a situation where you would need to crank it more that what the stock key allows you to do.
Anyway, "add a leaf" and torsion bar crank and a front end alignment and I'm running on 33's. I do have Toyota 4Runner stock wheels with a offset of 8 (not sure if it's 8 or -8, but the tires stick out beyond the flares). The prior owner must have had a "healthy" lift to the truck because the front bumper has been trimmed a little on the bottom corners, I guess to keep the tires from rubbing. It had painted black rims with 4 completely bald tires on it when I bought it and the front end was 3" higher than the rear and that was long before the popularity of the ridiculous "reverse rake" trend that I see out there now. So, I can only guess that when I bought my truck the prior owner had some kind of lift kit with oversized wheels and tires that they took off before it was put on the car lot where I bought it. Good luck!
