If you make it a tail-dragger mid-term you might want to move the airbags up from long-term. So you can, y'know, put a load in it. I wonder if a forward rake means less need for a belly-pan.
Make your air dam out of hangar door seal:
Aircraft Hanger Door Brush Seal | Precision Brush
If you use a 6" brush put 3" of lawn edging behind it for backup.
If I had a contractor's truck, I'd want a 110VAC outlet right below the right-hand taillight.