Hey, thanks for the tips. I was actually cruising around some of those sites today. I am nowhere near read up enough on the subject to ask them questions, but will try to make sure I don't ask the same basic questions everyone always posts.
Yeah, the smog/emissions rules have always confused me, too. They used to give you credit for it, now you can't do it. Meanwhile, many government vehicles run on dual gas/propane setups.
It seems to me that emissions test should just simply check your emissions. If you pass, you pass. It shouldn't really matter what your engine runs on, how it runs, what parts you have in it, etc. If you build an engine that drives you down the road safely, and doesn't pollute the environment more than whatever the standard is, then you're fine.
A slightly on-topic rant, I had a Chevy Tahoe I brought down from Oregon a few years back. I installed a K&N air filter on it, along with the little "CARB/smog legal" sticker for California. When I went to smog it, to register it as a California car, the smog guy said he couldn't even test it because it had an "altered air intake system" and was illegal. He said I had to put the factory intake back on the car to be legal, even with my little legal sticker.
Okay, enough ranting about things that I really don't have much knowledge about.
There's probably a good reason for all the rules and hooplah, I just don't see it.