Help Identifing
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Mountain Pass
Joined: Feb 2015
Posts: 167
Likes: 5
From: Virginia
Help Identifing
where can I find the serial number on my engine to confirm if its a W,C or M? And when i find it how do i tell what it is? We only realized it was 351 when the 302 firing order didnt work (uncle said it was a 302, its not). I would like to find the serial number and confirm my engine before doing any good work. I will also post this on the 303/351W forum as well. Thank you all for the help
Laughing Gas
Joined: Feb 2003
Posts: 1,234
Likes: 3
From: In the woods of Oregon
Count the valve cover bolts. 6 is Windsor 8 is Cleveland. The 400 and the 351M are both a Cleveland 335 series engine so they also would have 8. the 351M/400 is wider than a 351C because of the taller deck height. The 351M/400 also uses the same tranny bolt pattern as the 460/429. The 351C uses the same tranny bolt pattern as the 351W/302W.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Count the valve cover bolts. 6 is Windsor 8 is Cleveland. The 400 and the 351M are both a Cleveland 335 series engine so they also would have 8. the 351M/400 is wider than a 351C because of the taller deck height. The 351M/400 also uses the same tranny bolt pattern as the 460/429. The 351C uses the same tranny bolt pattern as the 351W/302W.
Also, there are no serial numbers on these engines. But, they do have casting numbers, and you can decode them via the info on Bubba's site: M-Block 351M/400 Parts Reference. And pictures and descriptions of where to find the casting code are here: M-Block 351M/400 Photo Archive.
Postmaster
Joined: Mar 2011
Posts: 2,698
Likes: 7
From: Taxachusetts
In addition to what has been already said.......If you do have a 'C,' a number - most likely a 2, or could be a 4, will be embossed on the corners of the heads...clearly visible and only particular to Clevelands......the heads, anyway.
Those numbers represent 2v or 4v.
C Block: The bell housing bolt pattern will be slightly rounded, will not have a 1.0"x0.75"x3.0" cast dealie in front and to the right (looking head on) of the distributor.
Those numbers represent 2v or 4v.
C Block: The bell housing bolt pattern will be slightly rounded, will not have a 1.0"x0.75"x3.0" cast dealie in front and to the right (looking head on) of the distributor.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
In addition to what has been already said.......If you do have a 'C,' a number - most likely a 2, or could be a 4, will be embossed on the corners of the heads...clearly visible and only particular to Clevelands......the heads, anyway.
Those numbers represent 2v or 4v.
C Block: The bell housing bolt pattern will be slightly rounded, will not have a 1.0"x0.75"x3.0" cast dealie in front and to the right (looking head on) of the distributor.
Those numbers represent 2v or 4v.
C Block: The bell housing bolt pattern will be slightly rounded, will not have a 1.0"x0.75"x3.0" cast dealie in front and to the right (looking head on) of the distributor.
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Laughing Gas
Joined: Feb 2003
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From: In the woods of Oregon
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