12v Negative Ground Electronic Ignition Kit with "Hot" Coil (Rated up to 55,000 Volts) Internally resisted: Complete Ignition Tune up kit: Distributor Cap, Rotor button, 90 Degree Spark plug wire set & 4 Autolite Spark Plugs. Fits: 4 Cylinder Ford Tractors: Golden Jubilee, Jubilee, NAA, NAB, 501, 541, 600, 601, 611, 620, 621, 630, 631, 640, 641, 650, 651, 660, 661, 671, 681, 700, 701, 740, 741, 771, 800, 801, 811, 820, 821, 840, 841, 850, 851, 861, 871, 881, 900, 901, 941, 950, 951, 960, 961, 971, 981, 2000, 2031, 2111, 2131, 4000, 4031, 4110, 4120, 4121, 4140 (1953 thru 1964). ...