When I first started working at a SW Iowa IH dealer in June of 1960 I hauled the updates in a pickup from Omaha IH warehouse. They were in a large & heavy wood crate. The 460 got new bull gears & brake pinion shafts, some bearings for various places in rear axles, transmission & differential. When completed the mechanic was to make a triangle stamp on the serial number plate. I can tell you if the rear end is apart it is easy to identify the bull gears by the 25% pressure angle of the gear tooth. Otherwise I can think of no easy way to id the upgrade from outside.
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Today's Featured Article - Engine Basics: Spark Plug Cleaning - by Staff. Cleaning procedures: Brush or blow dirt from around the spark plug base. Remove the plug with a correctly fitted wrench. Examine the porcelain insulator and points. If the insulator appears to be melted or blistered, cracked or broken, and the points seem unduly burned it is evident that the plug is operating too hot and it should be replaced with a colder plug. If the plug is fouled excessively with carbon it apparently is operating too cold and it should be replac
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