1. Does the engine have to be from California?- Yes.
2. How do they know the year of the engine? If the engine has a VIN stamped in it, they can look it up. That will also answer #1. The block casting code will also tell them the earliest year of the block.
3. Can you use a L98 crate engine and then use all TPI/smog/computer from that year car and say that engine is a 1991 L98 from a trans am? Would they know if I did that? First, offer no information other than what you are asked. If asked, say you bought a crate engine from GM. That's what they gave you for a California 1991 L98. Move along, nothing happening here. I don't see why this would be an issue at all.
One can also argue that a replacement engine doesn't have any certification. On the DOHC, I called GM and asked for a replacement block for 91-94 DOHC for California and Federal. Same part number for the replacement. If you get a rebuilt engine, it could be from anything as long as it's functionally correct. If could still have to old VIN in it. Vette and F body crates are somewhat different so that's something you have to watch out for. If they were to determine the engine is differernt, they will just switch the certification requirements and now you are installing dual cats, etc.
So the way to deal with this is:
1. Have a VIN from a California car that shows that engine. If you have that they will very likely skip the engine check (and most likely will anyway). In a Fiero, it sucks to find it in the first place.
2. Connect and install all of the emissions equipment for the car you are claiming was the donor. If it had two cat, install two cats, if it had one, then install one.
3. Get the car pre-tested somewhere to ensure it will pass the dyno two speed test.
4. Fabricate as little as possible in the intake tract and exhaust manifold.
5. Clean and neat, clean and neat.
Your odds of passing and getting blessed are extremely high. Even if you fail, it usually for something simple that you can correct and go back. I really don't think they will give you any trouble over the crate engine. You might ask GM if the crate engine is California certified. If so, get a printout of the crate part number showing that. If not, then erase that from your memory.
You're not doing anything that needs them to be suspicious. It a straight forward swap.
On the otherhand I'm not responsible for your inability to bend the rules ....
Terry
[This message has been edited by TK (edited 03-09-2004).]