351 to 400
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Joined: Sep 2006
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351 to 400
im replaceing my 351M with a 400m in my 77 F250 mud truck i was curious if there is any difference the 400 came out of a 1979 bronco i dont think there is any difference but i figured id check.
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Joined: Oct 2008
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The block is the same but the 400m has a different crankshaft and pistons compared to the 351m. here is a good article.
351M/400 Performance Build Up
351M/400 Performance Build Up
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79f-250custom
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
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May 1, 2006 10:21 PM
weverette1
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
3
Feb 14, 2005 08:39 PM
