Interesting. I didn't follow it through, the single render is good enough for me to see that I don't need to follow it through. lol.
I do sort of like the stubby wings on the back, but I don't like what appears to be some wind catchers around them. The roof vents are also interesting, but given the shape of the rest of the body they should be round if they should be there at all.
I like the idea of the deletion of the chrome bumpers, but it makes the car look taller (like a Jeep). Instead I would lower it, and maybe make up some custom fiberglass to bring that front end a little closer to the ground so it doesn't look like it could climb stairs.
The tail lights aren't right either. If you want to follow those lines, I say lose the chrome and french them inside of the body lines instead. It was probably just the convenience of being able to use Toronado or Riviera turn signals, but the sharp corners don't work with the rest of the body lines.