Yep Schurkey, u got it right.
Numbers up for chevy
Down for Pontiac.
You can also draw a file across the weights or cam to see if they're heat treated. If not, the file will remove material quite easily on each stroke. If they are and done correctly, if you're using a cheap file, you might end up knocking a good portion of the file off in the process. You won't scratch the finish of the good stuff from the factory.
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