Good post LC. I see you have a lot of knowledge in all things aero
Thanks for the advice.
One area I could envisage being used is a source of energy normally wasted; the exhaust. Not in the normal snese, but to drive a free running turbocharger that supplies compressed air to the blown slots. The intake for the compressor could be a section of the front of the vehicle in a high pressure area, making use of the high pressure and compounding it with 'wasted' energy from the exhaust.
I have a lot of spare turbochargers lying around. Selection will ultimately depend on providing a flow and pressure ratio that is achieveable without causing undue back pressure and reducing FE. A VNT turbo set to a couple of psi would self regulate and hopefully not overspeed... although they can handle up to 250k rpm these days.
I guess running insulated pipework from the engine bay up the A pillars and to the C pillars wouldn't be too arduous.