Ferrari 250 GTOs were designed and built as
racing cars, they have neither a speedo or an odometer. They should be raced, using them to potter along the A34 would be missing the point somewhat.
Assuming that the information and picture in the linked article are correct, then it's not the original bodywork (the later revised shape shown wasn't available in 1963). But then that's what happens with racing cars, they are crashed, rebuilt, developed - the value these the cars have comes from their competitive history.
Rather happily, this generally not true of the people who own 250 GTOs - there are many examples that are still properly raced in major historic events. Hopefully Chris Evans will do the right thing and this car will regularly be seen in the hands of top historic racers such as Peter Hardman or Martin Stretton at events like the Silverstone Classic and the Goodwood revival. A 250 GTO going through Woodcote in a four wheel drift beats a 250 GTO in a climate controlled room looking shiny hands down.