Even if you go with the Pertronix conversion, you still need to get the coil/resistor situation sorted out. Get it wrong and it will over load the electronics and burn it out.
The goal is to have either a true 12v coil and no resistor (which someone may have already done), or have a 6v coil and a 1.5 ohm resistor. The end result is about 3 ohms resistance across the coil primary including the resistor in series (if needed).
Be sure to go by what is printed on the coil, not what the counter man sells you, (they are often misboxed) or check the ohms before you buy it. The NAPA IC14SB is a true 12v coil if you need one.
Pertrinix may try to sell you an expensive high performance coil, it is not necessary and of no benefit on a tractor engine.
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Today's Featured Article - Museum Coverage: The Stuttgart Agricultural Museum - by Cindy Ladage. While cold wind was blowing back in Illinois, in Arkansas, daffodils were in bloom, and the Magnolia trees were adorned with fragrant blossoms. Stuttgart, Arkansas was the site of this year's winter Minneapolis Moline Collector's show February 25-27, 1999. The show was held at the Oliver Museum created by Don Oliver, the pioneer of the four wheel drive tractor. Oliver along with Gale Stroh and Kenneth Bull using Minneapolis Moline tractors and parts created what has become known as
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