I just bought some Bilstein 5100 leveling shocks for my NBS 2wd Z71. After 6.5 hours trying to install, we threw in the towel. I took my truck to NTB, but they claim they were unable to install the shocks on any settings above the lowest/OEM ride height. Whats the secret to installing these to get a leveled look? I'm very irritated that NTB wasnt able to do what I asked. I'm considering visiting another NTB to get a second opinion, and possibly a discounted rate to change the setting if they believe it's feasible. Any feedback would be appreciated.