[blue4400]

I'm not sure yet, the only place I can think about is behide the rear seat. I want to kept the lid on (sleeper).

You really don't need an intercooler at all, but it only helps. Remeber the cooler you kept the air the more power you will produce. When you crank up the boost, compressing the air into the motor it will result in more power. At the same time you will be losing the potentional of a lot more power because the more you compress the air the hotter it gets. Water injection is a good thing too, if you don't want to run an intercooler. I hope that is of some help. It all depends how much power you want to make.