1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

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351m / 400m

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Old

Aug 14, 1999 | 04:24 PM

#1

J.B.L.

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351m / 400m

Does anyone know if there is any difference between a 351m & a factory stock 400m, other than the bore?? Thanks in advance for the input.. JBL.

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Old

Aug 14, 1999 | 11:12 PM

#2

SteveT

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Joined: Aug 1999

Posts: 60

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351m / 400m

JBL, The 351M are identicle for the exception of the stroke. The bore is the same. The 400 has a 4.00" bore and 4.00" stroke. The 351M has a 4.00" bore and 3.50" stroke. Other than that, the two are excatly the same. Hope this helps!

Steve

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Old

Aug 15, 1999 | 07:20 AM

#3

jowilker

Fleet Owner

Joined: Jun 1999

Posts: 24,552

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From: Creedmoor, North Carolina

Club FTE Silver Member

351m / 400m

If I remember correctly the larger was sold as a 351 - 400, and not as a 400

John

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Old

Aug 16, 1999 | 10:03 AM

#4

Chuck P.

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Joined: Jun 1999

Posts: 861

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From: SE PA

351m / 400m

One other thing that is different in the 400 is the pistons, the 351's cannot be used with the 400 crank due to the fact that the wrist pin must be placed higher in the piston due to the longer stroke. Chcuk P.

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Old

Aug 16, 1999 | 12:09 PM

#5

chuck_1

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351m / 400m

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