Killer idea for a car. Reminds me of the X-11 Predator 4wd. I like the F-1 style suspension.
If there was a possible way to modify the rear input slipper shaft to allow the cells to run in a straight line it would allow the use of a wider variety of LiPo cells. LiPo saddles aren't too plentiful and the extra wires on them may make installing them in the car difficult.