351 ID Mishaps
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Junior User
Joined: Apr 2003
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From: HI
351 ID Mishaps
Here we go, When I bought the truck I was told 351. I looked at the VIN, and my deocder ring in the two manuals said Windsor. Now I am tearing it apart and I find out it is the 351M. Do you think I should go the parts store and apologize for calling them idiots when they gave me the "wrong" part so many times. I am glad I found out before I started buying gaskets and parts for the rebuild. The casting number on the head and the style of the intake manifold were the final straws. I have been doubting the VIN for a while, but looking at replacement parts and wondering why al online stores "had it all wrong" made me look a little deeper. Just wanted to share my learning experience. For now on, I am tearing the engine down and looking at every casting number before I buy a car.
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Junior User
Joined: Apr 2003
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From: HI
1FMDU15G4B.....
My manual says G=351W 2BBL 1981-1985
W=351M 2BBL 1981
Of Course it also says the first three digits will always be 1FD.
I have verified the VIN between the Registration and the Tag about 3570 times in the last two days.
I am not sure if the VIN decoder is wrong or the engine has been switched. The previous owner was an idiot who was selling the car for his brother in law. I have heard the same thing about 1982 being the year for the switch but then I have also seen others claiming to have a '81 351W. Who knows...
My manual says G=351W 2BBL 1981-1985
W=351M 2BBL 1981
Of Course it also says the first three digits will always be 1FD.
I have verified the VIN between the Registration and the Tag about 3570 times in the last two days.
I am not sure if the VIN decoder is wrong or the engine has been switched. The previous owner was an idiot who was selling the car for his brother in law. I have heard the same thing about 1982 being the year for the switch but then I have also seen others claiming to have a '81 351W. Who knows...
New User
Joined: Dec 2003
Posts: 9
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From: Oklahoma City, OK
my VIN decoder stuff shows the same stuff. Sounds like some funny business. Maybe it's really an '82 or later and somebody swapped an '81 body and/or VIN plate on it and registered it as such?
-BurntOrange
-BurntOrange
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Junior User
Joined: Apr 2003
Posts: 50
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From: HI
I read some other posts and it would appear we can not discuss what the M stands for. Can a moderator tell me why or can somebody else give me a link. I have been reading about Windsor engines for about 18 months now and I want to get started on the M/C now that I have the thing completely disassembled.
Thanks for the input BurntOrange. I am happy to hear that not all the information in my book is wrong.
Thanks for the input BurntOrange. I am happy to hear that not all the information in my book is wrong.
New User
Joined: Dec 2003
Posts: 9
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From: Oklahoma City, OK
To get up to speed on the 351M/400 335 series check out the following sites:
Technical section at ProjectBronco:
http://www.projectbronco.com/
FTE article - High Performance Options for the 351M/400 Engine:
https://www.ford-trucks.com/articles/mblock.php
Bubba's M-Block Ford V8 Workshop:
http://home.earthlink.net/~bubbaf250/index.html
-BurntOrange
Technical section at ProjectBronco:
http://www.projectbronco.com/
FTE article - High Performance Options for the 351M/400 Engine:
https://www.ford-trucks.com/articles/mblock.php
Bubba's M-Block Ford V8 Workshop:
http://home.earthlink.net/~bubbaf250/index.html
-BurntOrange
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