Did you ever find a HIN, or deduce who manufactured (or factory finished*) the hull?
*I refurbished a couple of Shenandoahs, which were in fact Blue Hole RX hulls outfitted with odd gunwales (square oak) and even odder seats (slat seats with a contour similar to an Adirondack chair).
The carbon Northstar is a helluva find. 16’ 6”, nice asymettrical shear and decent rocker (Bell says 2.5” bow, 1.5” stern).
For rebuild funsies Bell specs it at Max Width 34.5”, gunwale width 31” and 4” waterline at 31”.