[Sven7]

Political digs all in good fun.

In my opinion, don't even bother with a coroplast belly pan. It may get ripped off when you scrape. Just get a nice air dam (garden edging works well) that extends to the level of the lowest suspension/chassis component. You'll get most of the effectiveness with a fraction of the effort and cost. It'll bend out of the way when it hits the road and you can sticker bomb it as you have done with the grille block.

Spats also may be a lost cause with a car so low. I will suggest you just go for the low-hanging fruit, a Kammback or boat tail. Getting flush wheel fitment with a flat faced wheel up front should help aero, and tucking the rears as much as possible will give you clearance for full rear skirts.

Got any pics of this thing? The car I'm imagining (with all the mods) looks pretty badass. Wonder if stretching LRR tires would reduce their effectiveness.