yep I was chatting with a mate 2 days ago about this and he says that he has encounted the very same problem in a holden 308 V8. He said to fix his dilema he advanced the cam timing by one tooth at a time so he could start the engine at the factory specified ignition timing then fine tune it from there with carb settings and dizzy dwell angle. the cam ended up being 3 teeth out but he had to remove the crank sprocket and place it on the next key way which was just slighty less advanced than the first key way he used