Claus, that is what this thread is about, to try and prove that a Firebird was a Firebird regardless of where it was sold. They never came with Chev engines from the factory! They were all built in the USA! ZERO-28s were made at the factory!
I'm very willing to agree with your statement - if anyone can provide proof!!!
As I mentioned, I personally know some of the guys who were racing in Trans Am at the time and their choices were to race the OHC or lie about Canadian Firebirds. The OHC wasn't competeitive, so - they lied! And as a result, the myth appeared and is still being spread! The car used was a Camaro with a Firebird grill - maybe you could order one that way from Chevrolet!
Jim, I suspect the GTO is free from this myth, as it had only one purpose - to allow a Firebird to run in Trans Am with a V-8 engine - but some people lump the GTO in as one of the Canadian Pontiac muscle cars. Thank you for using your connections on this, I realize it is very hard to prove the nonexistence but I gotta try!