Your Welcome
Rear facing has nothing to do with where you install the seat. What it means is that the seat is facing the back. Just like your
chicco does. So, you can install it in the middle or either of the two sides, as long as you get a good install.
Your son might need to be more upright. The baby carriers have to be at 45degree angle. That is so that small babies wont have their airflow cut off. But at the size your son is, he can be more upright. That alone, should help alot with him being fussy. Plus, the
Blvd is on a base, so he might be able to see out the window better.
I hope that this has helped you, I am not a tech. But have learned alot in the past year. If you need more detailed information, you might want to visit
Car Seat.Org - Carseat, Vehicle & Child Passenger Safety Forums that forum has more people logged on at a time. So your question's will be answered quicker. The majority of the people over there are Techs, so that alone will help you get more info.