312954 One Tractor Carburetor Made to Fit Ford Models 501 601 701 2000 Made to Fit Ford/NH Tractor Models: 501 541 601 611 621 631 641 651 661 671 681 701 741 771 Also Fits Ford/NH Tractor Models: 2000 (4 Cylinder) 2030 2031 2110 2111 2120 2130 2131 Fits Model Numbers Listed with 4 Cylinder 134 Cubic Inch Engines Model Years 1958 - 1964 with listed Marvel Schebler Carburetors Replaces Part Numbers: B8NN9510A, TSX765, R0170, 0-13878, 312954