The smog machine doesn't know anything but what comes out of the tailpipe. If your performance cam has characteristics that cause increased emissions (over stock), then you are in trouble. I'm thinking about valve closing overlap, etc. Just higher lift by itself should not be a poblem. You'll just have to try it.
What are you doing about the visual inspection? Do you have to have the stock carb, etc?
Using an oversized carb (more fuel) might cause problems due to higher hydrocarbon emissions.
Some high performance items can cause increased increased NOX emissions.
What's been done to the engine other than the cam?
New cats with air injection might help the tailpipe situation.
