[ScottM]

Doug,
After '72, the CG required mfg's to place the HIN on the transom. With your boat being a '72, you're in a gray area. My '72 Seabird has the mfg's serial # on a plate inside a storage locker. Take a look around, I would think there is a plate somewhere that lists weight limit, HP rating, etc. By the looks of the HIN you give, it might have been assigned by the state in which it was titled.