I have a set of adapters in my JD GP. The threads were ruined in the head to the point that the plugs had been put in with J B weld so they would seal and stop coming loose. While that fix had worked, I removed them, cleaned the threads and loctigheted a set of Ream adapters into the head. ( got the correct thread tap from a model T restoration place) Now I can change plugs quickly without an overnight wait for JB weld to set up.
The adapters came with a chart of modern plugs that have the heat range and resistor -non resistor types. While I did this to save the head, I now have a multitude of options when selecting plugs including splitfire, platinum, hotter, and colder.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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