I'm trying to look up the rules over the years for bodywork and chassis and such. I remember Dan Wheldon's death a few years ago ushered in a brand new car. I suspect there have been a few mods since. Maybe a bit of a backtrack somewhere in the process? Shame.
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan