Steve G here is just finishing up a restoration of a Nova Ray, The Custom Craft (original) version of the Corvette. MFG purchased the molds from Custom Craft, but the Corvette and one other hull were the only ones produced by MFG. Sorry can't remember the other one right now, but it was based on the Custom Craft Flying Ray hull.
They are not easy to restore as the inner skin is bonded to the floor, (sole), and they are very tough to get apart.
Steve should have the boat at our Silver Lake meet in June.