[dsraven]

the axle centerline depends on the ride height because the front fender wheel opening tapers on the rear and is more rounded on the front. if you lower the truck down over the wheel with the stock axle centerline the wheel/tire looks like it is being stuffed into the rear of the wheel opening. you need to have the tire size and rim offset that you will finish the project with and then set it in the opening with the truck at ride height and the rake angle you like. then you will need to choose the look you like. less drop would mean less axle movement towards the front. a stock ride height and rake angle would mean the axle centerline could be left as is, theoretically. there are lots of threads on the subject but it is a personal preference thing and is really dependent on the tire size. smaller tire would have less visual effect because the tire has more clearance between the outside of the tire and the wheel opening so the air gap looks more uniform around the tire. larger tire or more drop is more visually noticeable.