GM Head Casting numbers

hrthomas

New Member
Joined
Jul 8, 2012
Messages
1
Karma
0
Car
69 El Camino 65 Chevby II
Need some help identifying these heads: 3911082

Thanks
Ryan
 

WallaceChevy

New Member
Joined
Jun 27, 2012
Messages
7
Karma
0
Car
1966 Chaparral XP-836
Do you think it could be 3911032?

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

makaveligh

New Member
Joined
Jul 14, 2012
Messages
1
Karma
0
Car
I ain't got a car
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

New Member
Joined
Jun 27, 2012
Messages
6
Karma
1
Car
Camaro 86
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

Moderator
Staff member
Joined
Oct 7, 2012
Messages
134
Karma
2
Car
1976 Chevy Cheyenne 1500 P/U
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

New Member
Joined
Jun 1, 2019
Messages
1
Karma
0
Car
77 Scottsdale 4x4 3/4 ton
Is this a 350 or 400 V0216TXD
 
Top