I had thought about that also, just mounting it to the valve cover. Problem was clearance in the front but ok in the back. Next problem was would I have clearance inside the cover for the bolts to hold it down with. My thinking was that the valve train is rather close to the cover. Thats whay I mounted the way I did. I suppose I could have just had it welded down to the cover. They are both mad out of aluminum.
I like the idea of TIG welding this directly to the valve cover. The Spinner 2 is only 6" high so, if clearance is an issue towards the front of the cover, why not leave the oil fill cap alone, and drill a new 1" hole near the middle, back of the cover, and then tig the base of the spinner directly to the cover, centeered over the hole. That way, there would be no fasteners to interfere with the valve train, etc, and only one hose to port , which could be done with the turbo port like other have suggested. It would also be secure... I would think that since all the moving parts of the Spinner are replaceable from the inside, unless the base developed a crack, there would be no problem with not being able to remove the base from the valve cover. Of course, all of this is easy to talk about, but doing it is another matter. Still, I do like the idea...
I have had a spinner 25 sitting around for a couple of years now and I came up with this idea about a year ago but I don't have access to a welder or know anyone who can weld aluminum. If you are close to Virginia we may be able to get this done on my truck. I have done some measuring and I think it will fit. It can't go dead center as there is already something there but I think that it will fit right behind the fill cap.
I was going to take my oil supply from one of the ports on the top of the oil filter head. I have been told that this is the best spot for a supply and I am faily sure that the FS2000 and other oil filtration systems use the same port. IIRC its a 1/8 npt fitting.