Sounds like a very cool car....is it an L72 or L36? . And where are you in Canada? .
I take it the engine is original and the car is Oshawa or St. Therese built? .
Can you lay the whole engine code on us or a pic of the pad? .
Is the confirmation of engine code by GM Canada you're referring to a copy of the microfilm Vin-Shipping list? .
These are a page of about 40 Vins that show engine codes and options shipped w/ each Vin also what I believe George and the boys at GM Canada glean the information from to prepare the documents they send. .
I think they stopped giving these out as they show the key codes for all Vins on the page?. .
George is a really great guy and he may still be able to give a copy to a true enthusist or blank out the sensitive info from the pages....anyone documenting their car should ask him anyway? .

~ Pete