For use on models 8N Ford Tractors Serial Number 263844 and up, NAA, 600, 700, 800, 900, 2000, and 4000 from 1950 to 1964. Ignition tune-up kit for side mount distributors contains Heavy Duty Point Set, Condensor, Heavy Duty Rotor, 4 Heat Range Matched Spark Plugs, and Gap Gauge for Points and Plugs.