I just got a bunch of plans from Tony Hunt. One of them I've fallen madly in lust with. It's called Heart's Desire II. A profile can be seen on the "Good seaboats, 18 to 25 ft." thread, pg three. If I become courageous maybe I'll try posting the lines.
Anyway, it is just under 23 ft. over all. It's a double-ended chined hull. Imagine a typical chined hull, but with the keel being a boxed arrangement, like a Seabright skiff's.
This gives substantial headroom, though not full for my 5'11'' frame. It places the engine down low, and with a horizontal prop shaft. Two of the advantages of this arrangement.
One question that comes to mind is that Atkin doesn't specify any ballast. This suprises me no end. I would think such a hull, with a 288 ft. cutter rig, would need to be ballasted with say 1200 lbs of lead pigs down in that box.