How do I get rid of odor in my car air conditioner?

There’s a local race track in my hometown that hosts regular amateur track meets. It sounds like a lot of fun, and I want to set up my car better with a Toyota 2JZ. But how much a 2JZ engine swap, and is it worth it to upgrade from the 1JZ?

I just bought a GMC truck. While I discussed the powertrain warranty with the salesperson prior to the purchase, I want to learn a little bit more about it in case something goes wrong. What’s the powertrain warranty from GMC cover?

Is it possible for my boyfriend and I to be on the same policy if we live together but drive separate cars? We're trying to simplify our lives and cut costs and it would be great if I could add my boyfriend to my insurance.