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Old 09-01-2012, 05:04 PM   #1
Moonbeam
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Engine decoding help.

The numbers from the back of the block are as follows: 3 GM 3970010.
On right front side of the block at the water pump: V0164TDR
Below that the best I can tell is: C85481191.
3 GM 3970010 = Maybe a 350 as I was told by my cousin (4 bolt main so he said).
V= Flint
0614= June 14th build date
TDR= Not sure but could be 155 or 175 horsepower.
C85481191= Not sure what this stands for.
I haven't gotten the engine out yet so if there are more numbers in other places I will have to wait before I can post those. Also, I will have to clean the engine to since it's extremely greasy.

Last edited by Moonbeam; 09-01-2012 at 05:29 PM.
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Old 09-01-2012, 05:41 PM   #2
geezer#99
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Re: Engine decoding help.

Dig around on here.
http://www.nastyz28.com/decode.php
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Old 09-01-2012, 05:45 PM   #3
Moonbeam
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Re: Engine decoding help.

Thanks geezer been digging around there for a while and haven't found everything I was looking for yet.
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Old 09-01-2012, 05:49 PM   #4
68350
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Re: Engine decoding help.

TDR 1972 350 conv. cab, a/t 175 4 K-10 & 20
TDR 1980 350 conv. cab, a/t, Cal L LS9 155 4 C-10 & 15

One of these 2
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Old 09-01-2012, 06:15 PM   #5
geezer#99
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Re: Engine decoding help.

3970010 is a 350. Only way to see if you have a 4 bolt is pull the pan. They came both ways.
Your last number is the serial number off the vehicle it came in.
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