Firstly you said you dont know if your bov is plumb back or not, does it go pssssh when you back off? if it DOES NOT then its plumb back, contrary to the advice above if aint broke, dont fix, also you need to get an airbox in there, if a cop drives past and see's the fmic and then hears the induction noise there's a good chance your screwed, you said that you cant do it because of the fmic piping, thats another problem, if the piping goes along the top of the radiator then most likely someone has cut a hole in your inner gaurd for the piping, if a knowledgeable cop spots that you will need to get an engineers certificate for it.
All of these little things are a give away to a cop and may get you pulled over, the biggest fear with you getting pulled over is that if this car comes up as a non turbo and you have a turbo then your screwed, it will have to be returned to being non turbo or do all the engineering and epa work to make it legal as a turbo, if you bought this from a car yard in the last 5 days (may be longer im not sure) you are still in the cooling off period and can take it back for a refund.
If you wish to meet some of the people from here and have them look at your car and possibly tell you a few things about it there is an SEI cruise posted in the cruise section for this sunday.