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1973 454 engine block stamp numbers

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Old Oct 24, 2014 | 05:22 PM
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Default 1973 454 engine block stamp numbers

I did a bone head thing I had the block milled on my 1973 C3 454 and did not record the stamped numbers . I know I know dumb move . Oh well not cryin about the spilled milk. Does anyone know of a resource where I can find the numbers ???

Last edited by MD Auto; Oct 24, 2014 at 06:04 PM.
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Old Oct 24, 2014 | 06:23 PM
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Hi MD,
This is really too bad.
There were 2 groups of numbers/letters stamped into the pad.
The first was done at the engine plant, Tonawanda in the case of a big block. A ' T' for Tonawanda, then 2 numbers for the month the engine was assembled, 1 or 2 numbers for the day, and then 3 letters for the configuration (HP) the engine was built in.
So something like…. T0623CPX.
The second was stamped on the pad in St.Louis and indicates the serial number of the car the engine was installed in.
So something like C11S117017.
I hope you're NOT CONSIDERING RE-STAMPING the pad???!!!
Regards,
Alan
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Old Oct 24, 2014 | 07:26 PM
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Originally Posted by Alan 71
Hi MD,
This is really too bad.
There were 2 groups of numbers/letters stamped into the pad.
The first was done at the engine plant, Tonawanda in the case of a big block. A ' T' for Tonawanda, then 2 numbers for the month the engine was assembled, 1 or 2 numbers for the day, and then 3 letters for the configuration (HP) the engine was built in.
So something like…. T0623CPX.
The second was stamped on the pad in St.Louis and indicates the serial number of the car the engine was installed in.
So something like C11S117017.
I hope you're NOT CONSIDERING RE-STAMPING the pad???!!!
Regards,
Alan
with everything Alan said, especially about the restamping. The final three letters in the engine assembly stamp would have been CWM, CWR, CWS, or CWT depending on transmission and where the car was delivered.

That's sad that engine shops still don't stop to ask people about 'the numbers' before it's too late.
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Old Oct 24, 2014 | 07:53 PM
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I am not so much a numbers matching guy ....BUT ...My friends are and they are giving me grief about a blank pad on the block ....SSSOOOOO Yea I am thinking about re stamping it .
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Old Oct 24, 2014 | 08:47 PM
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Originally Posted by MD Auto
I am not so much a numbers matching guy ....BUT ...My friends are and they are giving me grief about a blank pad on the block ....SSSOOOOO Yea I am thinking about re stamping it .
Ignore your misinformed friends . Better a blank pad than a lame looking counterfeit.
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