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Old Mar 29, 2003 | 07:57 PM
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bigf150
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351M and 400

Does anyone know the difference between the <a href="http://www.motorhaven.com/">351m </a>and <a href="http://www.motorhaven.com/">400 </a>besides stroke? Will everything from a <a href="http://www.motorhaven.com/"><a href="http://www.motorhaven.com/">351m </a></a>bolt up (powersteering and alternator brackets) are most of the internal parts the same? Thank you for your time.

-edited to correct nomenclature by moderator-
 

Last edited by Torque1st; Mar 30, 2003 at 01:40 AM.
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Old Mar 29, 2003 | 08:40 PM
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351M and 400

Yes they will!
 
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Old Mar 30, 2003 | 12:51 AM
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351M and 400

The 400 and the <a href="http://www.motorhaven.com/">351m </a>are the exact same block.
 
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Old Mar 30, 2003 | 02:16 AM
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351M and 400

They use a different crank, pistons and H balancer
 
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Old Mar 31, 2003 | 09:59 AM
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351M and 400

The 73 400 block has the small block tranny bolt pattern and will not interchange where a regular 400 or 351m sat unless you swap tranny bellhousings.
 
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Old Mar 31, 2003 | 05:17 PM
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351M and 400

Some, not all '73 blocks use the small block bolt pattern. The ones that do have the small pattern also have the flange area for the Big pattern. So all that needs to be done is drill and tap new holes. See,
http://members.tripod.com/lyc_42/fengpix1/odd400.jpg
 
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