I've got the front hanger moved forward
either way is good, the double shackles "can" unload on you, but I think that is fairly rare.
Your best bet is to get the rears up front mounted, and drive it. See how you like it, and go from there. Each person is different, and so is every set of springs. Thats the nice thing about using the stockers, is their cheap and you can mix'm around
