the chassis will have a common manual available for it . I take it that with a 454 motor and rochester carby that it is most likely a ford F series chassis and depending on single wheel rear drive or duel wheel drive it may be a f25o or-f350 vehicle . The size and length of the chassis may be a clue to what f series it is . Clues as to the chassis ans relevant manual may also come fro google and type in history of ford f series in motor homes. As for the add on bit The ( body it may require you and a friend with the use of a multimeter to do your pen schematics testing each wire and location of the points for those wires.) the chassis will have a common manual available for it . I take it that with a 454 motor and rochester carby that it is most likely a ford F series chassis and depending on single wheel rear drive or duel wheel drive it may be a f25o or-f350 vehicle . The size and length of the chassis may be a clue to what f series it is . Clues as to the chassis ans relevant manual may also come fro google and type in history of ford f series in motor homes. As for the add on bit The ( body it may require you and a friend with the use of a multimeter to do your pen schematics testing each wire and location of the points for those wires.)

problems with the key board -sorry should read and not ans, from not fro, pen should read own. problems with the key board -sorry should read and not ans, from not fro, pen should read own.