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Old 10-25-2010, 05:44 PM
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Default small block numbers-HELP!!

I have a 81 Camaro with a non original engine in it. I cant seem to find out what the engine and heads are so here are all the numbers, hope someone can help. Block casting number is 3970010-alsoA 20 5, these are are on the back of the engine. On the front pad just above the waterpump , under the alt are these numbers, C5B127127 V0127T. Head casting number is 378450 ,also on the heads is GN9T and E 10 79. Cant seem to find out what this is so if anyone can help I would appreciate it. THANKS!!
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Old 10-25-2010, 08:55 PM
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The "3970010" is a pretty common block, used in 1969 for the 302, and from 1969-80 for the 350.
"A 20 5" is the date code. A=January, 20=day of month, and 5 would have to be 1975 (the only year between 69-80 that ends with a 5).
C5B127127: C= that I'm not so sure about because a "1" instead of C= Chevy (maybe there's a difference because of what it came out of...read on), 5=1975, B= Baltimore, Maryland VIN assembly plant (not engine assembly plant), and the rest is the partial VIN.
V0127T: V= Flint engine Plant, 01= assembly month (January), 27= day of the month, T= truck motor division
The "450" heads were used on 267 and 305 engines. "E 10 79" date code is May 10, 1979.
So...you have a 1975 350 truck engine with 1979 267/305 heads.
Oh yeah, and here's a good link to research from: http://www.chevy-camaro.com/chevy-ca...oding-help.asp

Last edited by Camaro 69; 10-25-2010 at 09:02 PM.
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Old 10-27-2010, 07:40 PM
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You can also look up the numbers at www.mortec.com
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Old 02-11-2016, 10:02 PM
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I have a engine that has 3970010. On front of engine it has Eo329ckl 13j250675. Thank you.
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Old 02-12-2016, 05:54 AM
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Quote:
Originally Posted by Kimberly Morrison Martin View Post
I have a engine that has 3970010. On front of engine it has Eo329ckl 13j250675. Thank you.
0329 = Mar 29, CKL = 1973 350 California (emissions)
13J = Chev, '73, Janesville WI, vehicle assembly plant.

Thank you '69, for the link.
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Old 02-12-2016, 10:26 AM
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Default Motor Vin

I have a 350 with 3970010 on back of engine. On front it has V1122tbd and c9f369258. Thank you very mutch.
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Old 02-13-2016, 01:33 PM
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C9 = C-series model truck, 1979
V = Assembly plant Flint, MI
1122 = Nov 22
TBD = 1979 350 4-bbl, 165HP, Federal emissions


You're velcome
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Old 03-12-2017, 03:32 PM
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Default i have 2 engine blocks to decode help plz

Quote:
Originally Posted by Everett#2390 View Post
C9 = C-series model truck, 1979
V = Assembly plant Flint, MI
1122 = Nov 22
TBD = 1979 350 4-bbl, 165HP, Federal emissions


You're velcome
Can anyone help me decode 2 engine blocks
First one is 3914660. TO 626 HI

2nd is 3858180. TI 008 HCH
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