Do you have any idea what this LS1 Vett Numbers means?WallaceChevy said:Do you think it could be 3911032?
If so, the specs are: 68......307/327......70cc chamber
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.makaveligh said:Do you have any idea what this LS1 Vett Numbers means?
Block 1Y5126162 180152