The "fatter" part of the line will be out of the rod tip, thereby loading the rod immediately and allowing you to make a variety of casts with a short line as well as easily shooting the rear taper. Having the belly attached to the nymphing leader would also allow you to turn over the long leader and nymph. I do not have any experience with the "Great Lakes style" of flyfishing with running lines and slinkies so I'm not sure what your needs may be, but if any actual flyline could turn over this kind of a set-up would have to be such as I've described. Otherwise, my suggestion would be a centerpin reel and dink floats:eyecrazy:
Tight lines - tyler.
Still Living Large!