Thanks, Powerhouse.

Here is another sketch, over the Sterling package. It has kind of an old sprint car look, I guess... very mechanical.

It is easier to get ideas if I don't sketch right over the chassis photo. If a design looks interesting, it can then be drawn over the photo, for a more relevant proportion. I will take the best into Photoshop for quick renderings.
I have a Wacom Cintique tablet monitor so I can render right on the screen. A few of the earlier sketches were even drawn on the tablet. However most of these are drawn with pen (Niji Stylist or Pilot Fineliner) on 9x12 vellum and scanned.
Comments are welcome.

I wonder if that space frame will fit on an Aztec 7 body.

I don't think the Smart Roadster is what I am looking for.

... here's a faster windshield and some color on the last sketch.

I am still working on this thing and making great progress - but I am holding onto my latest artwork for now.
The main thing for my project at this point is research on possible chassis options. I am not into nor particularly expert at the mechanical side of this so am looking for a good, relatively turn-key chassis. Building a body is enough to deal with for me. On the other hand, it is like getting blood from a stone to get any decent chassis information or LO drawings, probably because they just don't have it in a usable format. Maybe they do but don't want to share it. I can understand that, given the nature of this business, where intellectual property is often considered fair game.
Anybody with chassis ideas or specific information would be very welcomed.
Thanks!