Lots of distillate heads on old H tractors. Thing is when we overhauled them we put in a high altitude piston, like 8000' and that brought it up very close to an H with std pistons and gasoline head as far as compression ratio and horse power. The heads didn't have hard seats so valve life was not as good, but then again we put them in sometimes also and valve rotators on exhaust valves. Manifolds were usually shot anyway so had a gas one put on most of them.
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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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