I believe GM shipped replacement engines with no number. It was the responsibility of the installing shop/mechanic to stamp the necessary numbers. That often didn't get done.

Last edited by Tiny; 06/10/2014 9:16 PM. Reason: fixing crappy spelling
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.