Turner's helicopter in the long shots is a Bell Jet Ranger but in close ups, it is an Agusta A109 variant.
When the helicopter John Saxon is in is airborne it can be seen as a Bell 206 JetRanger which has a long main rotor shaft and 2 main rotor blades, but at approximately 1:24 when on the ground it is a 4-bladed helicopter with a much shorter main rotor shaft, most likely a Sikorsky S-76 or Agusta AW-109.
The car that Paco Queruak drives from the city to the junkyard in Arizona is a third-generation (1982 or later model) Chevrolet Camaro. However, when Hunt and Peter Howell set the car ablaze the junkyard, it has changed to a second-generation (1970-1981) Camaro, as evidenced by the more curvaceous rear end styling.
At approximately 29 minutes and 46 minutes a Hughes 500 (369) helicopter is seen. These have a 5-bladed main rotor. The sound heard is that of a 2-bladed main rotor helicopter.