I think the big issue on the single action/mooching reel is it's designed to go below the blank when you're fishing it, and a levelwind goes above. The spine of the rod will be setup by the rod builder with the guides/reel seat atop the spine for a levelwind, and on the bottom for a mooching rod.
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The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope. -John Buchan