I just spent tonight lowering front of ladder bars. Before i had zero angle on very back of driveshaft. Now it looks like i have 2 degrees of angle just moving bars on hole down. I have adjustable shocks in regards of question. Is this enough angle? I cant tell until morning when i start car and drive it to see if vibs are gone. But zero angle is not good, i know that much, hopefully no more twisted driveshafts for me.