GM Head Casting numbers

hrthomas

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Need some help identifying these heads: 3911082

Thanks
Ryan
 

WallaceChevy

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Do you think it could be 3911032?

If so, the specs are: 68......307/327......70cc chamber
 

makaveligh

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WallaceChevy said:
Do you think it could be 3911032?

If so, the specs are: 68......307/327......70cc chamber
Do you have any idea what this LS1 Vett Numbers means?

Heads 853
0087B4373856

Block 1Y5126162 180152

Casting 12559378
 

Mahoney

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makaveligh said:
Do you have any idea what this LS1 Vett Numbers means?

Heads 853
0087B4373856

Block 1Y5126162 180152

Casting 12559378
853 is the ID number for the cylinder heads (in your case they are stock) and 12559378 is the engine casting number. Not sure what the other two numbers are.
 

ChevyHiPro

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Ryan;
Here's the short story on your heads, from their casting number;
"3911032 - 307/327 68-70 1.72/1.50 70cc"
The "70 cc" refers to the combustion chamber size (volume between the top of the piston and inside of the head when the piston is full up (Top Dead Center, TDC) and the inside, top of the combustion chamber (inside of the head where the valves are).
:shock:

> makaveligh ;
Regards your 'vette engine, by the casting number, 12559378, here's the short story;
"12559378 1997-up 350 Crossbolted LS-1 Aluminum"
:shock:

Definitely an all aluminum 'vette engine!
:D
It's a real keeper and will put out a lot of HP!
:D
Hope this helps!
:)
 

TD3

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Is this a 350 or 400 V0216TXD
 
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