Steve,
What is your ultimate goal with the car? are you trying to go for something that is very scale? or are you just building something out of spare parts?
If I were going to build one that was scale or semi scale looking and not based on a pan car, I think I would start out with truck wheels, strikers on RPM revolver wheels, or the speedy's truck foams
I also don't think I would use a tub chassis, I think I would be more inclined to make a plate chassis out of carbon or G10, and use the DS nose plate, This way it will be nice and narrow You could also go as far as to add a cage and some nerf bars out of piano wire. From there I would decide what wheelbase is going to look right and how you're going to lay out your body (you're going to have to make your own), you want the tires to look proportional, buggy tires wont look right, and the TC stuff you linked is going to be way small and narrow. I imagine you're also going to have to do custom offset shock towers so the shock angles and lenths look right, I would run .56 bodies and .35 shafts all around, and keep the shocks near vertical (this will limit your travel, but will look more correct for a super) Lastly, I think you could find a scale motor (I think parma made or makes one, or I'm sure the scale crawler guys have something).
Anyway, keep us posted, this could be a really cool project!