without the added aero features and looks more like street version of the car.

For the North American Racing Team, Ferrari itself was the main sponsor, so they let the car mostly speak for itself and the other sponsors had limited input as to where and how their logos were displayed.

Mostly though things like the mismatched numerals speak to an earlier time when individual cars were actually 'campaigned' and there was not the time or inclination to make the car 'pristine' visually for every race.