76 cougar
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76 cougar
i found a 76 cougar and the guy told me that it has a 351 m in it and i want to know to tell the differance between it and the 351 w and is the 351 m a big block or a small block cause i have been told both.
Posting Legend
Joined: Sep 2001
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The 351W and 351M both share the same bore and stroke. They are entirely different engine families. They both are considered by some to be a small block to use a Chevy term. The 351M shares the larger 400/429/460 bellhousing pattern required for higher torque capabilities and is a reduced stroke 400. The 351W has the smaller bell housing pattern shared with the 289/300/302. The 351W/M have the same bore spacing and with work, as in machining (search for "Clevor"), a very few parts are interchangeable.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Originally Posted by rdz
it should be a 351m because 351w were not made till 80's.
1975 was the first year a commercial vehicle received the 351W. It was the standard V8 used in Econolines (460 was optional).
First use of a 351W in a F Series: 1980.
Last edited by NumberDummy; Mar 26, 2007 at 01:27 AM.
