Don't know if all tractors do, but some 300 with fire craters will hit the H head. If you look at your 300 head you will see the edge on the other side from spark plug is sloped off and the H is not. You can grind that sharp edge on the H head to work if the piston hits. Make all 4 the same and don't go to deep. IH sloped the edge in combustion chamber on the 8043 head when they put it on a SH and advanced the suffix to DD. May not notice any power change.
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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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