Thanks - its formed plastic but the hull is fiberglass. I will post more pics tonight after I clean it all up. It also appears to have a fast fuel tank filler on the side so I am assuming it was used for racing. Hoping to have it running tonight after I clean the carb. Compression is very good so will be an interesting project to restore. Would you call it an Air Boat or a Swamp boat? I am in Australia and no one here has seen anything like it. Thanks in advance