Okay, I’m a little new to the whole lifting via shackle flip, so I have a few questions. Say I do the normal (as in there are a lot of people that have done it) 4 inch flip. The rear of the spring is lowered a certain amount (over 4 inches) to give the axle a 4 inch drop. However, along with lowering the axle, it also moves it forward. (see illustration) Is this were a longer spring comes in? Also, what about pinion angle?