Originally Posted by Inv4drZm

I've been looking at doing the same thing for a couple years now. You've probably seen that so forgive me if you've already read this.

Like you mentioned the rear upper link is right above a notch in the fuel tank. Without removing this link you wont be able to raise the tank, or at least not the back half of the tank. I believe you will need to swap to a 3 link rear to do it right. Good news is you can do this simply by deleting the passenger side upper link and beefing up the driver's side upper link and mounts. I think this will technically have the same 'geometry' as factory, with slightly more load on the panhard to keep the axle centered, and double the load on the single upper link.

At this point you will need a body lift and some fabrication to lift the tank. You could simply swap to the FJ tank but its from my measurements actually 3/4" deeper than the 4R's, it's only higher clearance on the front half where you save 1.5" because its angled on the bottom, and the strap spacing is slightly different. They are fairly cheap used on Ebay though. Would love to see a side by side pic on the ground showing the actual dimensions instead of me measuring under my brother's truck.