Measured the 2005 jeep 4x4 from the rubber fender trim to the center of the front wheel and it was 17.25". Is that the right way to measure or should it be from the edge of the metal fender? We also looked closer at the rear shocks and they are heavy duty shocks so we unbolted them at the bottom and the rear did not change the height at all. We conclude that maybe they have heavy springs for the tow hitch. The only thing to try is replacing those rear springs. Do know what the correct part number is for regular OEM without a tow package?
First DO NOT touch the rear, it more than likely is just where it should be
Second shocks do not provide any lift , only springs
Third you measure from middle of the wheel to bottom of the " plastic " flare
Forth , you measurement is more than likely right on, which means you are at least 1.75 inches lower in the front than what it was brand new
I have had ones in my shop that were as low or even a bit more lower than yours in front with only 75,000 miles on them, front springs are extremely weak from the factory, they are only rated at 310 lb and should of been 345-350. So that is why they sag so bad
In the end you need new front coils and new front shocks