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Old Feb 10, 2014 | 06:33 PM
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Intake Manifold
I have a 1977 Ford with a 351M engine will a Intake manifold off a 400 fit it 4bbl Intake Thanks in advance
 
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Old Feb 10, 2014 | 06:46 PM
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Yes, Except for the pistons and crankshaft, and harmonic balancer, the ford 400 and 351m are the same engine.
 
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Old Feb 10, 2014 | 08:07 PM
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Thank You Ordance
 
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Old Feb 10, 2014 | 09:33 PM
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Almost anything can be switched between the FE blocks.
 
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Old Feb 11, 2014 | 06:35 AM
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That is true, however the 351 and 400 engines are not FE blocks.
 
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Old Feb 11, 2014 | 02:50 PM
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351m & the 400 are in the 335 series of engines, the 2v heard on a 351c fit as well
 
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Old Feb 16, 2014 | 12:17 AM
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Actually the harmonic balances are the same too.

My bad - see post below!
 
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Old Feb 16, 2014 | 12:53 AM
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Originally Posted by SDDL-UP
Actually the harmonic balances are the same too.
Actually, this is not necessarily true, it depends on the application.

The 1980/89 FoMoCo Light Truck Master Parts Catalog lists two part numbers, one for each engine:

D5AZ-6316-A for the 1980/82 351M
D2AZ-6316-C for the 1980/82 400

I forget what the differences are but I've seen NumberDummy explain it here before...

This might help:

https://www.ford-trucks.com/forums/6...-balancer.html
 
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Old Feb 16, 2014 | 07:53 AM
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You guys at the end are just talking about the harmonic balancer not being the same but the intake will fit off a 400 engine right to a 351m
Thanks
 
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Old Feb 16, 2014 | 02:10 PM
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will a 351 Cleveland intake fit? or is the 400 wider?
 
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Old Feb 17, 2014 | 09:11 AM
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No the 351m and 400 are wider than a 351C. You'd have to get adapter plates made to take up the difference.
 
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Old Feb 17, 2014 | 10:26 AM
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Originally Posted by ctubutis
Actually, this is not necessarily true, it depends on the application.

The 1980/89 FoMoCo Light Truck Master Parts Catalog lists two part numbers, one for each engine:

D5AZ-6316-A for the 1980/82 351M
D2AZ-6316-C for the 1980/82 400

I forget what the differences are but I've seen NumberDummy explain it here before...

This might help:

https://www.ford-trucks.com/forums/6...-balancer.html
Yes they are externally balanced hence the difference...
 
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