Engine Numbers

[craig7l]

Hi,
anybody a clue what the engine number should comprise of (length of digits) on an LS3 engine.
I have 3 sets of numbers...a 6digit a 8digit and a 15digit????

thanks

[stevieturbo]

Havent a notion...any blocks I have had, have all had theirs removed ??

Actually machine removed too....not just a rough job. In front of right hand bank ( vehicle right )