It probably would make a bit more sense to look at them as series: Row Crop (in order of power): the "GP" which then was split out into H, B, A, G which were replaced by the 50,60,70 then the 520, 620, 720, and finally the 530, 630, and 730
"Wheatland" style D which then was "replaced" by the R then the 80 then the 820 and 830
"Inline" motors: The "M" and related "MT" became the 40, 420 and 430 with the inline 2 cylinder
The LA also had an inline 2 cylinder similar to the "M"
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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