Thanks for the ideas GRU!
Yeah I figure as long as I can prevent the car from funneling the air directly underneath the car/at the ground I should get a sizable benefit. Even just a simple grill block can be 5% so I'd imagine a nose redesign should give at least a 10% reduction in drag. Yeah I figure that I'll get a lot more benefit streamlining the underbody, adding a diffuser, and adding a Kammback. That being said, if I can reduce drag by 10% that's nothing to scoff at. I will be adding smooth wheel covers to all the wheels, and probably wheel skirts on the back. Did you mean to also add wheel skirts on the front? I'm not sure exactly how to do that.
I really like your lawn edging idea. I don't think I'd want to put it on the front like an air dam though because I should have nice linear flow under the body instead of just blocking the airflow off because the area is so turbulent. On the sides though it would allow me to keep flow attached after each wheel without ruining ground clearance. Do you think it would help to place them after the back wheels? I think I could design some sort of boat tail after the wheels out of lawn edging so that if it hit anything it would just deform and then go back into shape. Should I do this on the sides also? Like making a square pipe of lawn edging to go between the wheels(with the ends capped off) so that flow on the outside but also the inside by the diffuser is streamlined, but if it hits anything the square cross section would just deform to a rectangle with bulgy sides.
Here is a quick model of my interpretation of what you're saying being made as modifications to the design just before. It now has the wheel covers which I'd neglected to add, as well as the lawn edging in the shape I described. This is with 3inches of ground clearance btw(that thing at the bottom is supposed to be ground). I'll have more pictures with a better model shortly.