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Discussion Forum

Super M and 400, 450 Head

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07-26-2001 20:44:54

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It's me again. As I mentioned before I have replaced my standard M block with a Super M block which I think is a 450 (C281). There have been some differences, but I have overcome them pretty much with your help and others...Thank you for that. Now the question. On the standard M head there is a fitting that goes to the air cleaner that enters the rear side of the head. There is another fitting that is inside the valve cover, one toward the back and another one in the front. Running between those two fittings is a pipe that screws into both fitting. On the front side of the head there is another fitting that the govenor pipe is screwed into. After all said and done the air cleaner draws air causing a positive crankcase venlitation from the govenor. I really hope I am making myself clear here. But on the 400, 450 head the only place where fittings could be screwed into are in the front side and inside the valve cover on the front side of the head. There is nothing in the back that the air cleaner can attach to. Is the valve cover different between the standard M and the 450? If so can I modify my current valve cover and what does the inside fitting have attached to it? Boy I really wish that there where rendering online like the IH dealers have.

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