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Re: Compression ratio and smog levels.
A lot of stock motors from that era were 8.5 compression. 9.0 shouldn't be a problem. If the NO busts limits, you can retard the timing a bit which should lower NO but may raise HC. As others have mentioned, the modern catalytic converters have done wonders on allowing engines to be tuned more for power. An advantage the folks in the late 70s and early 80s didn't have.
Be sure to check the emissions rules on what is allowed and required. Some places seem to be real picky and others don't really care.
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