Dan,
From what I understand these days, one of the most challenging efforts of going 300 mph is trying to find a motel room. Do crews still rebuild engines, trans. and rear ends in them?
As far as driving a stock wheelbase Fiat, in any class, a person would almost have to find someone called 'Slim' or 'Shorty' or 'Slim-Shorty' to get 'er done.
Mike