[Sirrotica]

The race trailer off to the side in the video also was #83 on it so this is probably a racing family and that was the grandfather/fathers car sitting down behind the homestead. It's not uncommon in racing families for the next generation to keep the same number of the older generation or such as the case in the Petty family successive numbers, Lee had #42 Richard 43# Kyle had #44 and Adam was #45.

The reason for no lettering on the car was possibly the conversion to a 66 never was completed, or they lost the sponsorship. The doors could be used because little difference in the sheet metal. Reasons for re-skinning cars back then were ineligibility for a certain year because of rules, and also there was a bonus for winning a race with a current model year as opposed to a car 2-3 years old. This kept the cars appearance current and I know many cars that were just re-skinned in later metal over the winter if the car was still viable to run another season.

Dealers sponsored a good many of these cars and wanted the latest model year on the track due to the win on Sunday sell on Monday aptitude.