About any standard replacement cams for a M to a 450 made in the last 50 some years are supposed to be the same as what some call a 450 cam. If the 400 cam is in the same condition as whats called a 450 one there's no need to change. About 1/3 of the 450 engines used the same cam as a 400. Then IH decided to put left hand threads on them for the cam nut. Special cam grind could make more power if matched to your needs.
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Today's Featured Article - Magic Moments - by Tyler J. Woods. Magic moments don’t just happen. You have to help them along. This morning, I got up early. It is my day off from my regular workweek and I had a lot of things to do. It’s fall, and with winter coming on, there is a lot of work to do before weather closes in.
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