With all this time on my hands, I decided to fab up a filter bracket for my "hidden" oil filters (thanks, Bob). I used a good stiff piece of sheet metal I found in the barn (16 ga) and just pounded the hell out of it until it fit inside the frame rail. After drilling out the holes (should have done that first...) I used one of the Jerry Can Holder fasteners to secure the assembly to the frame.
Now all I have to do is see how much the exhaust system will impact the location of the filters...see photo four above.