Trailer tow pkg, what was in it?

The book lists: High-capacity cooling system, special radiator, high pressure rad. cap, rad to yoke-to-hood seal, 7-blade fan, fan shroud, heavy duty torsion bars, heavy- duty springs, anti-sway bar, 3.23 rear gears, heavy-duty flasher, 10" drums Mandatory equip. not included in price of towing package: auto trans, oversize tires 7.00x13" BSW