They are suppose to flex more. You don't have to run all the leafs either. I'm going to start with the main three. Overload and the next taken out.
I need a to borrow a DD so I can take my time though. I can't weld and frenching in the hangers is some real commitment. I guessing a weekend if I have a friend that welds and has patience with me.
Plum bob. 7.5 inches forward to start with on my 2000 taco. Then tack, cross tape, measure.