I have the morana girdle and windage tray and they clear my oil pan, mind you Morana had to grind the oil pan slightly to clear the windage tray, but the girdle itself cleared the pan. I like your idea of the new pan, as long as it clears the stock k-frame, its a cool idea.
EDIT: did you have your main caps shaved down flat? I did, we shaved mine flat and then shaved a little extra off to help clear the windage tray, but just shaving the main caps flat should help a lot. Plus it helps the girdle to sit better ont he caps.