I just layed a straight edge from the frame down, Measured from the straight edge to center of balljoint grease fitting ...11 1/2 on drivers side and 11" on passenger side.. 1/2 differance...That upr k-member has no adj on it' its just round holes that bolt to the frame..The lower rear has long slots but doesnt help with the upper...I just put all 4 upper bolts in, put the lowers in, the k-member wouldn't move any direction at all..Then i tightend all bolts...