[spacemanspif]

Love this project and say don't let aero be a reason for not doing it. At the end of the day you'll still have a nice car you can drive everyday which is better than I'm doing with my 5.3 getting 17MPG. The swap should be no harder than any LS engine project. I'm sure painless or PSI can hook you up with a stand alone harness and tune. Did you get the gas pedal from the donor car?? To keep things simple its best to get the pedal so you know it will play nice with the computer. Other concern is if the Camaros have electric power steering, not sure if they do but to save more weight and paracitic drag you can the manual steering route.
Don't worry about aero, put a barn-door style air dam on the front like the Bonneville cars, block off and seal up as much of the font end as you can while maintaing cooling ability and start plowing some air! Won't know what MPG its capable of getting until you try. It's nice that you'll be able to use an OBD2 gauge to monitor things too

Last thing: take lots of pics and share them with us!