I have a 1956 15 foot I am restoring now. sadly I have never seen any manuals on them. what kind of details were you looking to see ?
mine is 15.5 feet and has 4 seats - with a nini-deck between the rear seat and transom. windshield and front steering. there seem to have been many different configurations made by the factory. have seen quite a few hacked up by people too !
tim in Orlando