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Old Aug 31, 2017 | 09:20 AM
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Default Help with decode?
I have a 69 , 350 with th 400.. im confused on the serial number? i found on the passengers side rear. Can anyone tell me what it means? Thanks!! looks like 151169997


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Old Aug 31, 2017 | 11:36 AM
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Originally Posted by CAMS69
I have a 69 , 350 with th 400.. im confused on the serial number? i found on the passengers side rear. Can anyone tell me what it means? Thanks!! looks like 151169997


I haven't seen a stamp like that, factory stamp would not be that large for serial number and would have different characters in it. Warranty engine would have CE in beginning. The 010 block was used late 69, check for casting date which is on the other side of the back of the engine.
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Old Aug 31, 2017 | 12:05 PM
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why are you looking at the back of the engine as opposed to the engine stamp pad found on the front of the engine, passenger side, below the cylinder head?
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Old Aug 31, 2017 | 12:13 PM
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Hi Mel,
I believe C69 wanted to show the block casting number.
The second photo…. isn't that the stamp pad?
Aren't we seeing the front surface of an unpainted head and just a bit of the water pump and pump to carb fuel line?
Regards,
Alan
Last edited by Alan 71; Aug 31, 2017 at 12:16 PM.
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Old Aug 31, 2017 | 12:18 PM
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Hi C69,
Is there an engine assembly stamp on the other end of the pad?
Can you remove the paint on the pad?
Regards,
Alan

Last edited by Alan 71; Aug 31, 2017 at 12:24 PM.
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Old Aug 31, 2017 | 12:19 PM
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Hi Alan:
if the second photo is the front stamp pad, why the long number without any engine code? Thanks.
Mel
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Old Aug 31, 2017 | 12:23 PM
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Hi Mel,
I think that's exactly why C69 is asking.
Regards,
Alan
Last edited by Alan 71; Aug 31, 2017 at 12:24 PM.
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Old Aug 31, 2017 | 12:32 PM
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Default Thanks it's a mystery...
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Old Aug 31, 2017 | 01:03 PM
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K indicates the St. Catherines, Ontario engine plant. CM is a 60-61 283 code so I'm wondering whether the engine suffix is missing a character.
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Old Aug 31, 2017 | 02:38 PM
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Originally Posted by Easy Mike
K indicates the St. Catherines, Ontario engine plant. CM is a 60-61 283 code so I'm wondering whether the engine suffix is missing a character.
Is this a mystery?
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Old Aug 31, 2017 | 02:41 PM
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Hi C,
I don't know if it's a mystery or just stamps that folks aren't familiar with.
???
Regards,
Alan
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Old Aug 31, 2017 | 03:29 PM
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there appears to bes a third letter to the right of the CM which does not show completely in the picture
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Old Aug 31, 2017 | 03:35 PM
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Originally Posted by CAMS69
Is this a mystery?
Not really. GM has a big complex at St. Catherines. The CM is the odd ball since a 283 code shouldn't be on an 010 block.
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Old Aug 31, 2017 | 06:01 PM
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Default Yes!
Originally Posted by MelWff
there appears to bes a third letter to the right of the CM which does not show completely in the picture
It's a " J"
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Old Aug 31, 2017 | 11:24 PM
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cmj is 1974 350 code.
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Old Sep 1, 2017 | 06:33 AM
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Originally Posted by CAMS69
It's a " J"
Originally Posted by corvgreg
cmj is 1974 350 code.
That works for an 010 block.
Last edited by Easy Mike; Sep 1, 2017 at 06:34 AM.
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