Fits: Ford Tractor 501, 601, 611, 620, 621, 631, 640, 641, 650, 651, 660, 661, 671, 681, 700, 701, 800, 801, 811, 820, 821, 840, 850, 851, 860, 900, 901, 941, 950, 951, 960, 961, 971, 981, (4000 4-cyl.).