If you have sleeves already in the tractor, the pistons have to fit them (obviously). IH had high altitude pistons, and M&W and other manufacturers had various combinations of craters and steps. The 450 cam and head would help, especially the 450 LP head.
Really BIG HP would require a custom cam to change the firing order, electronic ignition, headers, and 806 carb or custom setup carb like on one of the tractor pulling websites.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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