[dsraven]

how you weld the clip on can depend on the ride height desired. low ride =clip attached higher on the frame. decide on wheel size etc before you get to this point. tire diameter makes a difference for clip attachment and wheel centering in the front fender wheel opening.
many different ways. some clips have the steering box ahead of the wheels and some are behind. makes a difference for the steering column shaft. some guys box the frame, some don't. whatever you do try to incorporate some frame stiffness around the cab mounts so the frame doesn't spread apart there. you will have body problems if that happens.