Ford makes/has made several different
oil filter adapters that will "point" the filter in a direction away from the frame rail. One that comes to mind was on a 460 engine in an Econoline. I used one several years. It mounts the filter at about 30 degrees, it allowed me to eliminate a short filter on my installation. As a side benifit with a little work you can block a passage, redirect the flow and plumb an
oil cooler with it.
Rick