[Cape Codder]

In areas that you can get behind to hammer and dolly to keep the pieces aligned I like to butt weld but, if it is closed and you can't get behind a small overlap will be easier. The area inside the door opening at each end of the rocker can usually be butt welded without getting behind as there is enough bend in the pieces to hold the shape. Where the rocker meets the cab corner the factory overlapped those parts and had a bead of sealer over the joint if I remember correctly. Try to weld it it as close as the way the factory did and things will fit better. Trimming parts to butt weld takes patience to get a good fit. Take your time.