1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

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Aug 21, 2011 | 11:31 AM

#1

gordyn66

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I have a 79 F250 4x4, with what i thought was a 400m in it. when i went to swap the 2 barrel carb and manifold for a 4 barrel i discovered a problem. Even though the part # on the manifold is correct for the 351/400m the center ports on the intake side of the heads are exposed. The heads are stamped with "M" . What have i got here

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Aug 21, 2011 | 01:02 PM

#2

400 .040over

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From: levittown,pa

it is nothing to worry about,i have the 400 n have the 2 round port exposed

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Aug 21, 2011 | 10:42 PM

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gordyn66

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Great thats good news. i was told it would leak exhaust thru those ports, but if it won't cause any problems i'll finish puttting it together. Thanks for the info.

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