I selected these three cars because the feet/legs are squished up front as far as possible (
possible with a rear engine design).
As I've mentioned before when analyzing other designs, there is a visual issue that deals with depth perception which in turn causes driver disorientation when the windshield is placed too far away from the driver.
Imagine trying to drive from the back seat, I seem to recall this as an old nightmare of mine many years ago.
One notorious example of this phenomena is the Pontiac Trans-Van of the mid-1980's. I witnessed an elderly lady judge a turn poorly resulting in hitting the cub between the lanes of opposing traffic, the van flipped when she hit the curb and she slid past my car upside down while I was waiting for the left turn light to go on.
http://s184.photobucket.com/user/kac...?sort=3&page=1
There is an additional issue with windscreen height which may be resolved by scaling up the design to mini-van proportions. I might look into this later, this is a "first blush" or "first pass" looking at the challenge ahead.