Complete Engine / Rebuild Overhaul Kit Ford 4 cylinder Sleeved 172 Gas Engine:800, 801, 811, 820, 821, 840, 841, 850, 851, 860, 861, 871, 881, 900, 901, 940, 941, 950, 951, 960, 961, 971, 981,4000 4 cylinder, 4031, 4120, 4121, 4131,4110, 4140.