warner swasey hopto mounted on 40's vintage Federal 4-5 ton 4x4 cabover chassis

have recently purchased this hopto and have not loaded or hauled it yet. It is yellow with warner swasey hopto in big black letters on side of boom. Anyone with info. as to year of mfg., operators manual, shop manual, and both engine mfg. & size is welcome to contact me anytime 661 225 7638 & e-mail fearfoot@gmail.com help!!! Fred

warner swasey hopto mounted on 40's vintage Federal 4-5 ton 4x4 cabover chassis