This is my truck with the OEM bilsteins still connected. I have the "z71" springs with Markmc's spacer (gray thing under springs)
Full extension of OEM shocks
I then unpackaged all the necessary hardware, which comes included with the shock. This hardware allows you to match the OEM mounts perfect
(thats wd40 on the shock, bolts were a little stiff)
Once i slipped the hardware into the appropriate eye holes ( they line up just like the stock ones do ) i mounted the upper shock mount
I did not have the truck jacked up at all, just left it sitting on all 4 tires during install. Once the Upper mount was in, i decided i would measure and see how much i was off from the lower mount. You can see that i have still not taken of the wire which keeps it compressed for inside the packaging.
^^^ that is still with the shock compressed