1971 Ford Trucks School Bus Chassis B-Series B-500 B-600 B-6000 B-700 B-7000 B-750 Sales Brochure. Important points to consider before buying any school bus. Ford chassis meet every school bus need. All major bus body builders install bodies on Ford chassis. Ford school bus chassis match or exceed all NEA requirements. Greater driving ease and maintenance convenience. Choose from nine proven engines...gasoline or Diesel. Features a power train selector as well as a component selector and specification guide. Back features Ford Club Wagons for special purpose transportation.