I personally found the breather lines to be positioned just fine, with the exception of the rear diff one, which I raised up to the gasoline door height.
Most guys here will tell you that there isn't much at all that you can do to the 3.7L to squeeze more out of it. It is what it is. Concentrate on making it better in the rough stuff. i.e. a suspension lift, better tires, tow hooks/hitch, maybe some weathertech liners, etc.
P.S. LOVE your "lady liberty defiantly hoisting an AR" decal!!! F#&% Cuomo! ΜΟΛΩΝ ΛΑΒΕ!