Although I'm not really concerned with it here you can totally pass all the smog test crap. There are a ton of systems that have the OE rating. Probably test even better than it does now and get better gas mileage. 350s were also offered in firebirds so the swap isn't an issue. I'm using my car as an example but am talking in general. What applications is it advised and where isn't it the best solution? More importantly I'd love to hear and stories good and bad about doing it or making a decision about it.