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351M/400 ??? which one?

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Old Jul 15, 2004 | 02:04 AM
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351M/400 ??? which one?

How do I tell the difference between a 400 and a 351? Every time I open the hood on one they all look the same and have a sticker on the valve cover saying 351/400m.

Clayton
 
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Old Jul 15, 2004 | 10:13 AM
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Look where it says displacement on the sticker.
 
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Old Jul 15, 2004 | 11:39 AM
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I have 3 of these engines avalable to me and where it says displacement on the sticker it says 351/400m.
 
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Old Jul 15, 2004 | 09:51 PM
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as far as i know the only difference is the crank so i dont think it really matters which one u have
 
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Old Jul 15, 2004 | 10:58 PM
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Look closer it's on there.
 
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Old Jul 16, 2004 | 12:51 AM
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your are looking at the engine family if you are seeing 351m/400 there will be another section on the sticker that will say displacement, and it will have one or the other on it without looking at one right now I think it is to the right of engine family.
 
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Old Jul 17, 2004 | 03:15 PM
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My truck doesn't have the sticker on it anymore, thats the first place I looked. The VIN says it should be a 351M but the previous owner swears its a 400. I'm inclined to believe him since the carb is from an automatic tranny and I have a 4 speed. How would I tell short of pulling the oil pan?

Chris
 
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Old Jul 18, 2004 | 03:39 AM
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"How would I tell short of pulling the oil pan?"

That's the only way. Because of the angle, you can't even use the old wooden dowel in the spark plug hole trick.
 
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Old Jul 18, 2004 | 01:46 PM
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Thats what I thought. I am not near as familiar with the 351M/400 as I am with the FE engines. I've got to replace the rear main seal on this engine anyway so I'll figure it out then.

Chris
 
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Old Jul 18, 2004 | 02:02 PM
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From: not mass
weight and string na na na it hangs..
i am thinking 8/32 and monofiliment with a glued knot
wht do you think any one got one of both for experimentation???
i read that on bubba's sight too

oops na na na on me just thought only would work parked sideways on a 30* slope(think this is a 60* engine) it will just ride the clyd wall otherwise

so it kinda might work in the right condions
 

Last edited by battered_bronco; Jul 18, 2004 at 02:07 PM. Reason: misspelled
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Old Jul 19, 2004 | 07:04 PM
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Here is where it says disp. on the sticker (if you have one)

[IMG]C:\Documents and Settings\Dan Olson\Desktop\400m[/IMG]
 
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