i know my 69 doesnt have the original engine but please help me decode this tag

on the back of the engine it says
3970010

on the front it says
11w207376 v03o4ccc

The suffix code V0304ccc breaks down to Flint Mich., March 04,'71 307 2bbl, 200hp,powerglide
Double check the casting number on that block, and see if it isn't 3970020? (which is correct for 71 307)
The 3970010 block was for some 68 327s, and 69-79 350s. VERY common block. Available in 2, or 4 bolt main, and also available in high alloy.

11w207376 v03o4ccc

Is a Nova engine

Confidential VIN
1 - Chevrolet
1 - 1971
W - Willow Run assembly (Nova only chevy car made there)
207376 - sequential serial number

Engine source, date and application code
V - Flint engine plant
03 - March
04 - Day of month
CCC - 1971 Nova 307-200 hp 2 bbl carb

the casting number is indeed 3970010

so are you saying the block is contradicting itself???

i was told it was a 350 is it not?

the back of the engine also said 23gm
if this helps at all

V03o4CCC


There is no 350 engine with this suffix code, they are all 307 applications in 1971 which this is a 1971 engine confirmed by the Con VIN.

You can't always tell the cid from the casting number, the stamped code rules. Unless the CCC is wrong, it shows to be a 307 in all references including GM sources. Thats all I have to go by.

i believe your sources,
so in that case i was lied to when i bought my car, yeah i should of checked but i was 16 and that was 7 years ago and i apparently wasnt the wiser. so in that case this engine is definately not staying in the car.
thanks elcamino for clarrifying something i never even knew about

here is a link to the picture of the id code, from what it looks like the first letter might be a o and i think it is...

http://community.webshots.com/photo/185727219/187429322TcjyFL

I looked at those pics and they are what you say there are.

Here is a image from Chevy sources;

http://www.synthetic-oil.com/images/71eng_codes.jpg