This looks like a cool idea. As for the radiator inlets, a NACA duct would be the ideal inlet without introducing drag. However if you already have the sides tapered inwards following the "template", I'm not sure how well the air will be able to curve in beyond that into the duct. It may be a non-issue all together, but something to consider.
I really like the idea of using a FWD engine/ trans layout in the rear, that seems like an awesome way to set things up simply on a budget, especially if you can pull the subframe all in one and deal with the suspension all in one. Plus, if you were ambitious you could easily have 4 wheel steering.
