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Hi all. I was wondering if someone could help me with the numbers that I found on the block under the alternator area on my 1970 Elky SS 396. Here are the numbers 0013T0408CTW. The 3 was very lightly stamped so it could be a 3 or possibly an 8 or maybe even a 6. From what the original owner told us, it was a NOS warranty long block that was put in when the original block went bad.

Any help in decoding it would greatly be appreciated since the books that I have do not have any listing for these numbers.
 

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Here goes my best shot.

T=Tonawanda Engine Plant
04=April
08=8th day
CTW=Turbohydromatic 400, High Perf

I don't know about the 0013, thats not shown in the book that I have. I have a pic of my engine code posted on my webpage below....
http://www.geocities.com/elky72ss454/Myp-o-p.html
Scroll down and look for the thumbnail pic on the right side of the page. Click on the thumbnail for a full pic. Has my engine code and part of my vin # also stamped in the block. My engine code is on my block just the way the book shows all 1970-1975 engine codes to be.
 
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