In our case the D21 Series II would outpull the 1206. My brother pulled his 21 against me on grandpa's 1206 and handed it to me more than once. Now the 1256 with it's Schweitzer turbo and 407 cu inches vs the Series II 21 that was close. For longevity the IH would beat the Allis. The A-C had weak connecting rod design and quite a few engine blocks were windowed. The bull gears were also known to fail on the D21's. IH spent a ton and a mean a ton of hours testing the 806/1206's before they were released. They did not want a repeat of the 560's failures and history will show of some well cared 06's and 56's have accumulated incrediable number of hours before needing repair. I have a neighbor that has a 1026 hydro with a DT407 engine going in for it's first overhaul with 34,000 hours. Wow!
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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