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Old 09-28-2003, 04:49   #1 (permalink)
1bad77
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351m - 400?

Howdy All,

My 77 has the 351M engine in it. The spec tag on the block says 351M/400cid. I've done a little research and have heard that essentialy the 351M and 400 use the same block. Is this true? And, if this is the case, can you put 400 heads on the M, and call it a 400? Also, does anyone know of a site that could give a little more details on the specific differances. I'm trying to build a street/strip show truck and I'm trying to figure out how to get more power out of the engine.

TIA,

A.
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Old 09-29-2003, 00:01   #2 (permalink)
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Re: 351m - 400?

see: http://www.projectbronco.com/History..._ford_351m.htm So yes with new pistons and crankshaft.
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Old 09-29-2003, 00:07   #3 (permalink)
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Re: 351m - 400?

Also see:http://www.amotion.com/fcm.html
and
http://phystutor.tripod.com/stang/en...cleveland.html
and
http://www.ford-trucks.com/articles/mblock.php
and
http://home.earthlink.net/~bubbaf250/parts/parts01.html
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Old 09-29-2003, 00:16   #4 (permalink)
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Re: 351m - 400?

and to quote http://home.comcast.net/~jelerath/mu...ecs/specs.html

"The 351M/400 crank is has the larger journals, like the 400C. So it is easy to turn a 351M into a 400; just change the crank and rods."

Although I think the rods are identical and you need 400 pistons if you use 400 heads.
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Old 09-29-2003, 03:26   #5 (permalink)
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Re: 351m - 400?

These are great sites. Thanks for the info!
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