The problem with raising the rear on a IFS 4Runner is the way to raise the front is to adjust the torsion springs. In theory you have about 1.5” available. But the more you crank it up the harsher the ride gets, and at the max it’s really bad. Plus, I gotta think that’s gotta be pretty stressful on the upper ball joints.
You can lift the front w/o cranking the torsion bars by using ball-joint spacers.
After modifying my rear springs, and setting the front measurement pretty close to stock I measured the height from ground to wheel opening lip. My front was about 1” higher than the rear. 36”/35”. I do have 31x10 tires.
The difference in height is due to the wheel openings not being the same to begin with.
