Two times, we see Natalie in her room, lying on her bed in her tennis outfit. The first time was right after she loses her match. The second time is after she gets out of her parents' car. The second time, however, everything is in the exact same place as it was during the first scene.
Keith gives Natalie an American-made 4-barrel carburetor to rebuild. Later we see it being install on the engine of Keith's 1962 Chevrolet C-10 pickup truck. However, the accompanying overhaul instruction sheet is clearly shown to be for a single barrel Solex PICT-3 carburetor. The sheet even says it is for a 1968-72 Type 1 or a 1968-71 Type 2. These are, respectively, a Volkswagen Beetle or Karmann Ghia, and a Volkswagen Microbus.