 Two variations were proposed, the 707-820(505) model and the 707-820(506) model.The 505 model would have had a fuselage longer than the 707-320B and would have carried 209 passengers in mixed-class configuration and 260 passengers in all-economy configuration.The 506 model would have had a fuselage longer than the 707-320B and would have carried 225 passengers in mixed class configuration and 279 passengers in all economy configuration.