Engine Ident
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Joined: Feb 2005
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Engine Ident
I have recently purchased a 79 F150, the previous owner said it has a new motor he wasnt to sure on what it was however, he claims 351w but wasnt sure, it came stock with the 351m according to the vin#, where might the identification number be and where could i find the chart to decode it? any help on this matter would be greatly appreciated, thanks.
P.S the only numbers i could find are on the intake and i know they arent it but someone said you can ID it with them? (13726548)
P.S the only numbers i could find are on the intake and i know they arent it but someone said you can ID it with them? (13726548)
Posting Guru
Joined: Mar 2003
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From: spartanburg, SC
its a 351M/400 if its got 8 valve cover bolts.
351W has 5.
351M/400 has the thermostat on the block in front of the intake.
351W has the thermostat on the intake.
351W has 5.
351M/400 has the thermostat on the block in front of the intake.
351W has the thermostat on the intake.
Last edited by F150daniel; Feb 12, 2005 at 01:00 PM.
Posting Guru
Joined: Mar 2003
Posts: 1,253
Likes: 2
From: spartanburg, SC
"13726548" that looks like the firing order for the 351C/351M/400.
It could be a 351C or 400. 351M and 400 look the same. the only difference is crank and pistons.
351C has a intake less that 11" wide. 351M/400 is a little over 12".
It could be a 351C or 400. 351M and 400 look the same. the only difference is crank and pistons.
351C has a intake less that 11" wide. 351M/400 is a little over 12".
New User
Joined: Jan 2008
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Unless the sticker is on the original engine & is readable,The only way to tell the difference between the 351M & the 400 is to measure the stroke.
The stroke on the 400 is 4"
Now that we know it is 335 engine series engine,for more discussion about it we can move this thread to that forum.
The stroke on the 400 is 4"
Now that we know it is 335 engine series engine,for more discussion about it we can move this thread to that forum.
