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From: Wisconsin
hard to get an accurate measurement, but i measured a 351m/400 intake's width at approx 12 1/2". took the measurment across the TOP of the intake (widest part). from the top of the gasket surface of one side to the same location on the other side. i don't have a 351c intake to measure, but i know they are narrower because you can run a 351c intake on a 351m if you use spacers. this is assuming that the intake has not been milled/shaved to compensate for milling the deck. i'm sure the one i measured has not been. hope this helps.
Last edited by sparky69; Oct 30, 2005 at 01:17 PM.
Senior User
Joined: May 2004
Posts: 207
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From: Wisconsin
Originally Posted by Bill_Beyer
Valley measurement is taken between the lowermost portion of the head sealing surfaces after they're mounted on the block.
i got approx. 8 3/4" between the lower part of the head sealing surface on the 351m/400 intake that i have. it is not installed on the motor tho...
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