I added Sumo several years ago. At the time I recall several inches with the front wheels hanging. Also recall them almost touching with wheels on the ground. I did not use the black spacers they provided.
Always felt my front was too low, but that seems to not have changed over the years.
2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..